Simplify (-0.9x^2 + 0.12xy - 7.2y^2) - (-3.1x^2 - 0.14xy + 6.5y^2)

(-0.9x^2 + 0.12xy - 7.2y^2) - (-3.1x^2 - 0.14xy + 6.5y^2)

-0.9x^2 + 0.12xy - 7.2y^2 +3.1x^2 + 0.14xy - 6.5y^2

-0.9x^2+3.1x^2 - 7.2y^2- 6.5y^2 + 0.12xy+ 0.14xy

2.2x^2 -13.7y^2 +.26xy