Subtract the following algebraic expressions:.
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1. 2p⁴-7q⁴-4p²q⁴-p⁴-q⁴-2p²q²= p⁴-8q⁴-4p²q⁴-2p²q².
2. 1+x²+y²+z²
3. 14b-2a-11a+7b= 21b-13a.
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I don't know about 2nd no. if 1st and 3rd are correct .please follow me.
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