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2.) 2(1-3m) + 5(2+2m) = 2 - 6m + 10 + 10m = 12 + 4m ( a & d)
3.) ( -7x² + 2x - 7 ) + ( 7x² + 5x + 7 ) = ( -7x² + 7x² ) + ( 2x + 5x) + ( -7 + 7 ) = 7x ( b)