simplify the expression
(x+5y-3z)-(x-4y+4z)
is this right
x^2+1y-7z
2.(4x-1)(x^2+6x-6)
(x+5y-3z)-(x-4y+4z) = x+5y-3z-x+4y-4z = 9y - 7z
2. (4x-1)(x^2+6x-6)
(x^2+6x-6)(-1) = -x^2-6x+6
(x^2+6x-6)(4x) = 4x^3 + 24x^2 -24x
Combine like terms.