$\left(-2\right)+\left(-3\right)+9+\left(-2\right)+1$
$5x+2y-3x-y+4y-4y$
$\left(k^2-5k-2\right)\left(k^2+2\right)$
$\frac{dy}{dx}=-x\cos\left(x\right)+\sin\left(x\right)$
$7+2\left(x-5\right)-6x$
$\left(6+3i\right)-\left(4-2i\right)$
$tanx-\frac{3}{2}=0$
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