Решать (а/а-2в + в/а+в)* а^2+ав^2/а^2+3ав

(a/(a-2b)+b/(a+b))*(a²+ab²)/(a²+3ab)=
a/(a-2b)+b/(a+b)=(a²+ab+ab-2b²)/(a-2b)(a+b)=(a²+2ab-2b²)/(a-2b)(a+b)
(a²+2ab-2b²)/(a-2b)(a+b) *(a²+ab²)/(a²+3ab)=
=(a²+2ab-2b²)(a²+ab²)/(a-2b)(a+b)(a²+3ab)