Simplify the expression my combining like terms 4y plus 5x

Simplify the algebraic expression by combining like terms. (Simplify your answer.) -5x^2+13x^2...

Simplify the expression by combining any like terms. m+3m-2m-9=

Simplify the expression by combining any like terms. 4y+6-2y-9=_____ (Simplify your answer. Do not...