Rápido porfavo solo la 1 serie?

A) <img src="https://tex.z-dn.net/?f=4%20x%5E%7B3%7D%20-8%20x%5E%7B2%7Dy%20-4x%20y%5E%7B2%7D%20-32b%20x%5E%7B2%7D%20%3D%20%0A-%28%208%20x%5E%7B2%7D%20y%2B4x%20y%5E%7B2%7D%20%29%20%2B%28%204x%5E%7B3%7D%20-32b%20x%5E%7B2%7D%29%20" />

<img src="https://tex.z-dn.net/?f=-%28%208%20x%5E%7B2%7D%20y%2B4x%20y%5E%7B2%7D%20%29%20%2B%28%204x%5E%7B3%7D%20-32b%20x%5E%7B2%7D%29%20%3D%0A%0A-4xy%28x%2B4y%29%20%2B%204%20x%5E%7B2%7D%20%20%28%20x%20-8b%29%20%3D%0A%0A%28-4xy%2B4x%29%28x%2B4y%29%28x-8b%29" />

Obten el termino que se repite en todas y lo restas

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b) <img src="https://tex.z-dn.net/?f=%5Btex%5D5x%20%28%20x%5E%7B2%7D%20-xy%2B2%20y%5E%7B2%7D%20%20%29-%28%20x%5E%7B2%7D%20-xy%2B2%20y%5E%7B2%7D%20%29%3D%20%285x-1%29%28x%5E%7B2%7D%20-xy%2B2%20y%5E%7B2%7D%29%0A" />

[ / tex]

c) <img src="https://tex.z-dn.net/?f=100%20x%5E%7B4%7D%20-49%20%3D%20%2810%20%20x%5E%7B2%7D%20%2B7%29%2810%20%20x%5E%7B2%7D%20-7%29" />

d)<img src="https://tex.z-dn.net/?f=64%20x%5E%7B3%7D%20-27%20%3D%20%284x%20-3%29%2816%20x%5E%7B2%7D%20%2B12x%2B9%29" />

e) <img src="https://tex.z-dn.net/?f=125%20y%5E%7B6%7D%20%2B8%3D%20%285%20y%5E%7B3%7D%2B2%29%2825%20y%5E%7B3%7D%20-10y%2B2%29" />

f) <img src="https://tex.z-dn.net/?f=16%20y%5E%7B4%7D%20%2B1%20%3D%20%284y%5E%7B2%7D%20%20%2B%202y%2B1%29%284y%5E%7B2%7D%20%20-%202y%2B1%29" />

g) <img src="https://tex.z-dn.net/?f=x%5E%7B9%7D%20-1%20%3D%20%28x%5E%7B2%7D%20-1%29%28%20x%5E%7B4%7D%20%2B2%20x%5E%7B2%7D%20%20%2B1%29" />.