$\sqrt{x^2}-7$

$\left(m-3\right)\left(m^2-3m+9\right)$

$3x+\frac{x}{2}$

$\int\frac{3x^2-x+8}{\left(x+4\right)\left(x^2+4\right)}dx$

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

$\int_0^5\left(e^{-2t}\right)dt$

$9-x^2=0$