Signs and Symbols

+	addition, plus, positive
-	subtraction, minus, negative
a * b a x b ab a·b	a times b, multiplication
a / b a ÷ b ab-1	a divided by b, division
=	equal to
	approximately equal to
a ~ b	a is similar to b, of the order of
	congruent to
	not equal to
	identical to
a < b	a is less than b
a > b	a is greater than b
a b	a is less than or equal to b
a b	a is greater than or equal to b
a b	a is proportional to b
%	percent
:	ratio of
xn x^n x**n	x to the power of n
	infinity
	perpendicular to
||	parallel to