пожалуйста! нужна помощь!

4
1)2p/(2p+q)-4p/(2p+q)=(4p+2pq-4p)/(2p+q)=2pq/(2p+q)
2)2p/(2p-q)(2p+q)-1/(2p-q)=(2p-2p-q)/(2p-q)(2p+q)=-q/(2p-q)(2p+q)=
=q/(q-2p)(2p+q)
3)2pq/(2p+q) :q/(q-2p)(2p+q)=2pq/(2p+q) *(q-2p)(2p+q)/q=2p(q-2p)/(2p+q)
5
1)1/(x-2y)+4x/(x-2y)(x+2y)-5/(x+2y)=(x+2y+4x-5x+10y)/(x-2y)(x+2y)=
=12y/(x-4y)
2)(x+4y)/(x-4y) -1=(x+4y-x+4y)/(x-4y)=8y/(x-4y)
3)12y/(x-4y) :8y/(x-4y)=12y/(x-4y) *(x-4y)/8y=3/2y
6
1)1/(2a-b)+4a/(2a-b)(2a+b)-3/(2a+b)=(2a+b+4a-6a+3b)/(4a-b)=
=4b/(4a-b)
2)(4a+b)/(4a-b)+1=(4a+b+4a-b)/(4a-b)=8a/(4a-b)
3)4b/(4a-b):8a/(4a-b)=4b/(4a-b)* (4a-b)/8a=b/2a