Помогите пожалуйста решить!!!

1.
a) = 3x/2=1,5x
б) =(x+1)*(5x-3)/4*(x+1) = 5x+3/4
в) = 3(x+3)/(x-4) * 4(x-4)/(x-3)(x+3) = 3*4/(x-3) = 12/(x-3)

2.
a) =2x* (x-4)/3x^3 = 2(x-4)/3x^2
б) = 5(x+3)/3(x-5) * (x-5)(x+5)/3(x+3) = 5(x+5)/9
в) = 7(x-2)/(x-3)^2 * (x-3)(x+3)/2(x-2) = 7(x+3)/2(x-3)