1.-【-a^2]^3*[-a]^2/[-a^2] 2.[2x^2+3x+5]^2-[2x^2+3x+4]^2

问题描述:

1.-【-a^2]^3*[-a]^2/[-a^2] 2.[2x^2+3x+5]^2-[2x^2+3x+4]^2