Can someone solve these for me?Can someone correct meif I didn't type these right

Question

1.(m-2)/(m-5)*(m+5)/(m-2)
2.4(x+2)/5x*(6x^2)/2x
3.(25-x^2)/12*6/(5-x)
4.(a^2-9)/a^2*(a^2-3a)/(a^2+a-12)
5.(5x-5)/(16)/(x-1)/6
6.(6-3x)/(5)/(4x-8)/25
7.(x^2-9)/(4X+12)/(x-3)/6
8.(x^2+13x+12)/(x+2)/(x+1)