<img src="https://tex.z-dn.net/?f=%283x%5E%7B3%7D%2B6x-5%29%2B%28x%5E%7B3%7D-x%2B2%29" />
<img src="https://tex.z-dn.net/?f=3x%5E%7B3%7D%2B6x-5%2Bx%5E%7B3%7D-x%2B2" />
<img src="https://tex.z-dn.net/?f=4x%5E%7B3%7D%2B5x-3" />
A + B = <img src="https://tex.z-dn.net/?f=4x%5E%7B3%7D%2B5x-3" />
<img src="https://tex.z-dn.net/?f=%28x%5E%7B3%7D-x%2B2%29%2B%28x%5E%7B2%7D-6x-1%29" />
<img src="https://tex.z-dn.net/?f=x%5E%7B3%7D-x%2B2%2Bx%5E%7B2%7D-6x-1" />
<img src="https://tex.z-dn.net/?f=x%5E%7B3%7D%2Bx%5E%7B2%7D-7x%2B1" />
B + C = <img src="https://tex.z-dn.net/?f=x%5E%7B3%7D%2Bx%5E%7B2%7D-7x%2B1" />
<img src="https://tex.z-dn.net/?f=%282x%5E%7B2%7D-3x%2B1%29%282x%2B1%29" />
<img src="https://tex.z-dn.net/?f=2x%5E%7B3%7D%2B2x%5E%7B2%7D-6x%5E%7B2%7D-3x%2B2x%2B1" />
[img = 10]
(P)(Q) = [img = 11]
[img = 12]
[img = 13]
[img = 14]
(P) (Q) - R = [img = 15].