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A<img src="https://tex.z-dn.net/?f=30%20a%5E%7B3-4%2B2%7D%3D30%20a%5E%7B1%7D%20%20" /> b)<img src="https://tex.z-dn.net/?f=21%20a%5E%7B2%2B1%7D%20b%5E%7B3-1%7D%3D%20%2021%20a%5E%7B3%7D%20b%5E%7B2%7D" /> c)<img src="https://tex.z-dn.net/?

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Aaron55171
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A<img src="https://tex.z-dn.net/?f=30%20a%5E%7B3-4%2B2%7D%3D30%20a%5E%7B1%7D%20%20" />

b)<img src="https://tex.z-dn.net/?f=21%20a%5E%7B2%2B1%7D%20b%5E%7B3-1%7D%3D%20%2021%20a%5E%7B3%7D%20b%5E%7B2%7D" />

c)<img src="https://tex.z-dn.net/?f=a%5E%7B2-1%7D%20b%5E%7B3-1%7D%3Da%5E%7B1%7D%20b%5E%7B2%7D%20%20" />

d)2bc

e)<img src="https://tex.z-dn.net/?f=%20a%5E%7B10%7D%20b%5E%7B-15%7D%20%20" />.