Question

3（x³）²×x³－﹙3x³﹚³＋﹙5x﹚²×x的七次方

Answer 1

原式=3*x^6*x^3-3^3*x^9+5^2*x^2*x^7

=3*x(6+3)-27*x^9+25*x^(2+7)

=3*x^9-27*x^9+25*x^9

=(3-27+25)*x^9

=x^9