Verified answer

1) 2(x+5) / ((x+5)(x-4)) = 2/(x-4)

2) ((x+6)(2x-3)) / ((2x-3)(2x+3)) = (x+6)/(2x+3)

3) (6a-1)^2 / ((6a-1)(a+2)) = (6a-1)/(a+2)