6x² + 4xy - 2x ( 3x + 2y ) = ?, 2x² + 2x - 2x ( x + 1 ), 6x² + 6x - 3x ( 2x + 2 ), 4x² + 4x - 4x ( x + 1 ) = ?, 4x + 12 - 2 ( 2x + 6 ) = ?, 12x² + 15x - 3x ( 4x + 5 ) = ?, 6xy + 6x²y - 3xy ( 2 + 2x ) = ?, 12x² + 4xy - 4x ( 3x + y ), 8x² + 4x - 2x( 4x + 2 ), 20x + 8y - 4 ( 5x + 2y ),

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