Using horizontal method :
Add `x^(2)+y^(2)- 2xy , -2x^(2)-y^(2)-2xy and 3x^(2) +y^(2) +xy `

Add the following expressions using horizontal method : -x^(2)y + xy^(2) + 2xy , 3x^(2) y + 4xy^(2) + 5xy and 7x^(2)y - 10xy^(2) - xy

Using horizontal method : Subtract -x^(2)+y^(2)+2xy " from " 2x^(2)-3y^(2)

Add : 5x^(2)-2xy +8y^(2), 3xy -7y^(2)-2x^(2) and y^(2)+xy-4x^(2) .

Subtract using horizontal method : 5x^(2) + 7xy - 2y^(2) " from " 3x^(2) + 5xy + 2y^(2)

What should be added to x^(2) - y^(2) +2xy to obtain x^(2) + y^(2) + 5xy ?

How much bigger is 5x^(2)y^(2) - 18xy^(2) - 10x^(2)y than -5x^(2) + 6x^(2)y - 7xy ?

Add x^2+y^2+3xy-6 and 2x^2-4y^2-xy+5

How much is -x^(2)+7y^(2)-3xy less than 2x^(2)-y^(2)+xy ?

Subtract using horizontal method : x^(3) - y^(3) + 2 " from " x^(3) +y^(3) + 3xy +1

Simplify the following : 2x^(2) + 3y^(2) - 5xy +5x^(2) - y^(2) + 6xy - 3x^(2)