Упростите выражение

Question

Упростите выражение

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Answer 1

1) y+3y/(y-3)=y^2/(y-3)
2) 2/(x-5)+(x+5)/5x=(10x+x^2-25)/5x(x-5)
3) 4/(x+4)-x/(x-4)=(4x-16-x^2-4x)/(x^2-16)=(16+x^2)/(16-x^2)
4) (2p-q)/p(p+q)+(p-2q)/q(p+q)=(2pq-q^2+p^2-2pq)/pq(p+q)=)p^2-q^2)/pq(p+q)=
=p-q/pq