ALTHEA86IN ALTHEA86IN Math Answered C.Simplify.Addition and Subtraction.1.2a+5w-3a____2.xy-7xy+3xy____3.3(x+y)+7(x+y)___4.(x²-7xy+y²)+(4x³+5xy-7y2)___ 5..(x²-7xy+y²)-(4x³+5xy-7y2)___