$3x^2+5\left(x-4\right);\:x=-5$

$\frac{1}{\cos\left(x\right)}+sec\left(x\right)$

$\frac{x^2+7x+10}{x+3}$

$\left(x^{-2}y^32x^4y^4y^{-2}\right)^2$

$\left(x+2\right)+\left(x+3\right)+\:\left(x+2\right)+\left(x+3\right)+\left(z-2\right)+\left(b-y\right)+\:\left(z-2\right)+\left(b-y\right)+\left(a+x\right)+\left(b-y\right)+\:\left(a+x\right)+\left(b-y\right)$

$4x+x-7x$

$\frac{d}{dx}y^{2x+1}$