Subtract the sum of `x^2+2x+2 and xy^2+3` from the sum of `2x^2+5x-1 and y^2+x^2y-3`

Subtract the sum of (x^2+2y^2+7x^2y) and (x^2-3xy^2) from the sum of (x^2-y^2-xy) and (3x^2-2y^2-7)

Subtract the sum of 13 x-4y+7z and -6z+6x+3y from the sum of 6x-4y-4z and 2x+4y-7.

Subtract the sum of x^(2)-5xy +2y^(2) and y^(2)-2xy -3x^(2) from the sum of 6x^(2)-8xy-y^(2) and 2xy-2y^(2)-x^(2) .

Subtract the sum of (x^2-2y^2+xy) and (y^2+z^2+xyz) from the sum of (z^2-2zx-xyz) and (x^2+xy)

Subtract the sum of 2x-x^2+5\ a n d-4x-3+7x^2from\ 5.

Subtract 2x^2-3xy from the sum of x^2-3y^2+11xy and y^2-4x^2+9xy

Add 2x^2-3x+1 to the sum of 3x^2-2x and 3x+7.

Add x^2+2x y+y^2 to the sum of x^2-3y^2 and 2x^2-y^2+9.

The sum of x^(2) - y^(2) and y^(2) - x^(2) is

From the sum of 5x-3x^2+y^2 and 8x-3y^2-x^2+x subtract the sum of 2x^2+y^2+4x-2y and x^2+y^2-3x-2y