Plus sign (+), minus sign (-), multiplication sign (× or), division sign (÷ or/), union of two sets (∩), intersection (∩), root sign (√), logarithm (log, lg, ln, lb.

People only talk about addition, subtraction, multiplication and division in mathematics, not logarithmic differentiation. Because addition, subtraction, multiplication and division are the most basic four operations, and they are also the most widely used symbols (basically used in primary schools from small to large, and other operational symbols should be learned from junior high school at the earliest). )。