4xy2 – 7x2y, 12x2y -6xy2, -3x2y + 5xy2
Let us add the given expression
4xy2 – 7x2y + 12x2y – 6xy2 – 3x2y + 5xy2
( 1 mark )
Upon rearranging
= 12x2y – 3x2y – 7x2y – 6xy2 + 5xy2 + 4xy2
( 0.5 marks )
= 3xy2 + 2x2y
( 0.5 marks )