question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

(arithmetic) arithmetic operator

unary operator (operator taking one operand)

(mathematics) A procedure for generating a value from one or more other values; operation.

to calculate

-ed, -ee (marks the passive recipient of an action)

a covering / the act of covering something / (by extension) a protector or patron

subject to / experience; undergo; bear; suffer / receive; get / endure; take / outcome; result; effect

(algebra, computing) binary operator

importance