Ребят помогите срочноо

1) ((-4х-5у+6х)/2х²у)*(4x²y²/(2x-5у))=2у 2) ((х+1+х-1)/(х-1))*((х-1)/х)-2/(х+!)=(2х*(х-1)/х*(х-1)²)-2/(х+1)=(1/(х-1))-2/(х+1)=(3-х)/(х²-1) 3)(4(х-1)/5(х+1))*((х+1)/(х-1))=4(х+1)/5(х-1)