RUBYLYNTORRESGO RUBYLYNTORRESGO Math Answered Perform the indicated operation.6. 9x+2x-77.(13x + 12y) +(8x-5y)8.(6x-9y) - (11x-2y)9.(4x^2 +5x +9) + (-4x^2 + x-9)10.(15x^2+6x-14y^2)-(15x^2+6x-14y^2)