These are the answers i wanted corrected:

Question

4x12/4x
d+7/d^2-49
t^2-25/t^2+t-20
2x^2+6x+4/4x^2-12x-16
6-y/y^2-2y-24

You will have to use brackets to show the intended order of operation.

How can we 'correct' your work if you supply neither solutions nor answers?

I will be happy to critique your work.