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

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

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)

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

Subtract : 5x^(2)-3xy -7y^(2) from 3x^(2)-xy-2y^(2)

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: 2x^2 -5xy +3y^2+5 from 4x^2+3xy-5y^2+9

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

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

Subtract 5x^2 - 4y^2 + 6y - 3 from 7x^2 - 4xy + 8y^2 + 5x - 3y .

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)