2(x的立方)平方乘x的立方-(3x的立方)的立方+(5x)平方乘x的7次方

问题描述:

2(x的立方)平方乘x的立方-(3x的立方)的立方+(5x)平方乘x的7次方

2(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7
=2x^6*x^3-27*x^9+5x^9
=2x^9-27*x^9+5x^9
=-20x^9