1) x-4/x-3+6/x^2-9=2 2) x-7/x-5+20/x^2-25=6/x+5 3) 8/x^2-4+x-4/x+2=x-4/2-x 4) x+1/x-2+x-2/x+3=15/(x-2)(x+3)