https://math.stackexchange.com/questions/864606/difference-between-%E2%89%88-%E2%89%83-and-%E2%89%85
In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical Operators B

https://en.wikipedia.org/wiki/Glossary_of_mathematical_symbols
Glossary of mathematical symbols A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for expressing all

https://en.wikipedia.org/wiki/Plus_and_minus_signs
The plus sign ( +) and the minus sign ( −) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous.

https://en.wikipedia.org/wiki/Equals_sign
Equals sign. The equals sign ( British English) or equal sign ( American English ), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. [1] In an equation, it is placed between two expressions that have the same value, or for which one studies the conditions under which

https://math.stackexchange.com/questions/846707/what-does-%E2%88%88-mean
I have started seeing the "∈" symbol in math. What exactly does it mean? I have tried googling it but google takes the symbol out of the search.

https://emojipedia.org/check-mark
A thick check mark / tick displayed on some platforms in a handwritten style. Generally displayed in black. Commonly used in lists to signify completed tasks or verification of a statement of fact. Previously shown in red on Samsung and green on Google and Microsoft . Note: this emoji is not supported in Twitter / X names, to minimize confusion

https://mathworld.wolfram.com/Tilde.html
The tilde is the mark "~" placed on top of a symbol to indicate some special property. x^~ is voiced "x-tilde." The tilde symbol is commonly used to denote an operator. In informal usage, "tilde" is often instead voiced as "twiddle" (Derbyshire 2004, p. 45). 1. An operator such as the differential operator D^~. 2. The statistical median x^~ (Kenney and Keeping 1962, p. 211). The tilde is

https://emojipedia.org/double-exclamation-mark
Two large red exclamation mark (!) symbols placed side-by-side (!!). Double Exclamation Mark was approved as part of Unicode 1.1 in 1993 and added to Emoji 1.0 in 2015.

https://en.wiktionary.org/wiki/%E2%89%88
Symbol. ( mathematics) Approximately equal to. ( topology) Homeomorphic to.

https://en.wikipedia.org/wiki/List_of_typographical_symbols_and_punctuation_marks
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.

https://en.wiktionary.org/wiki/%E2%8A%99
( mathematics, physics) A vector pointing out of the page. ( mathematics) The Hadamard product between two matrices. ( computing, dated) ISO 2047 symbol for Shift In. (boolean algebra) XNOR gate. ( chemistry) hydrogen ( Daltonian symbol ) Technically, this should be red: ⊙. May also be typeset ☉.

https://www.grammarly.com/blog/parentheses-and-brackets/
Parentheses and brackets are punctuation marks used to set apart certain words and sentences. Parentheses, ( ), are used to add extra information in text,

https://www.merriam-webster.com/grammar/punctuation
Double possessives, semicolons, apostrophes, comma splices, and more explained here.

https://emojipedia.org/warning
A triangle with an exclamation mark inside, used as a warning or alert. This emoji is used prominently within social media platform BeReal's core time-sensitive "⚠️ Time to BeReal ⚠️" push notification. This notification is shown when being prompted to share a photo of themselves and their immediate surroundings, with this notification

https://www.wikiwand.com/en/List_of_typographical_symbols_and_punctuation_marks
Learn about the marks and symbols used in typography with Latin script, and see a comprehensive list of Unicode characters and other languages and symbol sets.

https://sphweb.bumc.bu.edu/otlt/MPH-Modules/PH717-QuantCore/PH717_BasicQuantitativeConcepts/PH717_BasicQuantitativeConcepts2.html
Multiplication. There are three commonly used means of indicating multiplication. The symbol " x ", e.g., 5 x 6 = 30. Note that this symbol is generally avoided in algebraic equations because of the common use of "x" to indicate an unknown quantity. The symbol " * ", e.g., 5 * 8 = 40. The use of the asterisk to indicate multiplication is

https://en.wikipedia.org/wiki/%E2%89%A1
See also. ≅, a symbol used in approximation. The eight trigrams of the Bagua: ☰, ☱, ☲, ☳, ☴, ☵, ☶, ☷. Ξ, capital letter Xi of the Greek alphabet. 三, Chinese numeral for the number 3. Glossary of mathematical symbols. Tesla Model 3, whose logo originally stylized the digit 3 as three horizontal bars. III (disambiguation

https://www.thepunctuationguide.com/slash.html
Discover the proper use of slash ( / ) in various contexts, such as alternatives, per, or line breaks. Avoid common mistakes and confusion with this guide.

https://en.wikipedia.org/wiki/Multiplication_sign
The multiplication sign ( × ), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [1] While similar to a lowercase X ( x ), the form is properly a four-fold rotationally symmetric saltire. [2]

https://math.stackexchange.com/questions/3958074/what-is-the-meaning-of-%E2%8A%8A
Short answer: A ⊊ B A ⊊ B means that A A is a subset of B B and A A is not equal to B B. Long answer: There is some confusion on mathematical textbooks when it comes to the symbols indicating one set is a subset of another. It's relatively clear what the symbol " ⊆ ⊆ " means. This symbol is more or less universally understood as the

https://emojipedia.org/upside-down-face
Upside-Down Face. A classic smiley, turned upside down. Implemented as a flipped version of 🙂 Slightly Smiling Face on most platforms. Commonly used to convey irony, sarcasm, joking, or a sense of goofiness or silliness. Its intent can be similar to the bemused Oh well! of 🤷 Person Shrugging or the shruggie emoticon, ¯\_ (ツ

https://math.stackexchange.com/questions/4380266/meaning-of-the-symbol-%E2%89%A1
2 I want to know the meaning of ≡ this symbol. I read about it on Wikipedia but didn't actually understand what that means.