- List of mathematical symbols - Simple English Wikipedia, the free . . .
∞ is a symbol used to represent unending amounts Either plus or minus depending on the situation If y= [+|-]x then x is either positive or negative depending on the situation y= [+|-]x y equals either +x or -x depending on the scenario
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- 10 Punctuation Marks: Usage, Rules and Explanation in English . . .
Learn punctuation marks with clear rules, correct usage, and common mistakes in English grammar Simple guide for learners and teachers
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unwanted objects or material left in space by human activity, such as pieces of old or destroyed equipment Or, browse the Cambridge Dictionary index Free word lists and quizzes to create, download and share!
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