fas fa-calculator  试一试
fas fa-divide  试一试
fas fa-equals  试一试
fas fa-greater-than  试一试
fas fa-greater-than-equal  试一试
fas fa-infinity 试一试
fas fa-less-than  试一试
fas fa-less-than-equal  试一试
fas fa-minus  试一试
fas fa-not-equal  试一试
fas fa-percentage  试一试
fas fa-plus  试一试
fas fa-square-root-alt  试一试
fas fa-subscript  试一试
fas fa-superscript  试一试
fas fa-times  试一试