Math
+plus−minus±plus minus÷divide=equals≠not equal≈approximately≡identical≤less or equal≥greater or equal<less than>greater than∞infinity√square root∛cube root∑sum sigma∏product∫integral∂partial derivative∆increment delta∇nabla∈element of∉not element of⊂subset⊃superset∪union∩intersection∅empty set∀for all∃there exists¬not∧logical and∨logical or∴therefore∵because∝proportional°degree‰per mille%percentπpi