[2a+3) + (a+5) ] ² = 10 a2 + 96-[2a-3) - (a+5)2
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2a2+3a+10a2=10a2+96-20a2+6a
31a2+3a=96+6a
31a2+3a+-96-6a=0
31a2-3a-96=0
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