I am taking an online math class and I have hit a huge bump on the road. I have two weeks left and I am freaking out! I can't seem to understand this at all. I took this class 10+ years ago and most of it comes back as soon as I see just a problem or two done step by step.

-7x^2/28x^5y is the first problem which for the life of me I can't do, I feel so dumb.

Does anyone konw how to do these?!

8x^2/x-9 times x^2+6x+9/16x^3