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=[ ( 2x+2) + ( x+5/2x-6) ](x)
= [ 2x+2+x+5/2x-6] (x)
= [ 3x+7/2x-6] (x)
= [ 3x²+7x/2x-6]
= 3x²+7x-2x+6
= 3x²+5x+6