1. [ (2x/x+3) - (x+2/x) / (x^2 + 3x + 2/x^3+2x^2-3x) ] - (6-9x/ x+2)

2x over x+3 minus x+2 over x etc that's how it goes

2. [(x - 3overx-2 ) ( 1over x+1 - 1)] - 1overx-2 - 1over(x-2)(x-2)

3. [ 1 over x^2-3x+2 + x^2+2xoverx^2-4 ] / x^3+ 1over2x^2-2x-4

tnx in advance :D