4a^2b-a^2b^3怎么做?另外还有3x^2-3x^3y^2-4x27x^2-18x+325a^2-10(a-b)+11/2x^2+xy+1/2y^2-x3y+xy^3-3x^7+24x^5-48x^3(a+b)^2-4(a+b-1)4x^2-25共十一道,100悬赏,

问题描述:

4a^2b-a^2b^3怎么做?
另外还有3x^2-3
x^3y^2-4x
27x^2-18x+3
25a^2-10(a-b)+1
1/2x^2+xy+1/2y^2
-x3y+xy^3
-3x^7+24x^5-48x^3
(a+b)^2-4(a+b-1)
4x^2-25共十一道,100悬赏,