Simplify -14cd-2c^2d^2+15cd+9c^2d^2-15cd

$- 14 c d - 2 c^{2} d^{2} + 15 c d + 9 c^{2} d^{2} - 15 c d$

Combine the opposite terms in $- 14 c d - 2 c^{2} d^{2} + 15 c d + 9 c^{2} d^{2} - 15 c d$ .

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Subtract $15 c d$ from $15 c d$ .

$- 14 c d - 2 c^{2} d^{2} + 9 c^{2} d^{2} + 0$

Add $- 14 c d - 2 c^{2} d^{2} + 9 c^{2} d^{2}$ and $0$ .

$- 14 c d - 2 c^{2} d^{2} + 9 c^{2} d^{2}$

$- 14 c d - 2 c^{2} d^{2} + 9 c^{2} d^{2}$

Add $- 2 c^{2} d^{2}$ and $9 c^{2} d^{2}$ .

$- 14 c d + 7 c^{2} d^{2}$