$x^2+6x-2$

$cos^2\left(x\right)+cosx-sin^2\left(x\right)=0$

$\left(2d+2\right)\left(2d-3\right)$

$x^2+x+112=0$

$\left(6x+9\right)\left(3x-12\right)$

$\frac{dx}{dy}=\tan\left(4\cdot x\right)$

$-15-\left\{-4\left[-5+\left(4\right)\left(3\right)\right]+3\right\}+\left[\frac{32}{\left(-8\right)}\right]$