x^20/[(-x^2)^3]^2-x^2 * (-x)^3/(-x^2)^2

问题描述:

x^20/[(-x^2)^3]^2-x^2 * (-x)^3/(-x^2)^2

x^20/[(-x^2)^3]^2-x^2 * (-x)^3/(-x^2)^2
=x^20/(-x^6)^2+x^5/x^4
=x^20/x^12+x
=x^8+x