$\frac{\left(sec\:x+1\right)\left(sec\:x\:-1\right)}{sin^2x}=sec^2x$

$\frac{\left(\sqrt{7}\right)^2+\left(\sqrt{7}\right)^2+\left(a-c\right)^2}{42}$

$\int-\left(\frac{x^2+3x+18}{\left(x-5\right)\left(x^2+44\right)}\right)dx$

$-100-50-50$

$x+2y+x+2x$

$4\left(b\:-\:2\right)\:-\:10\:=\:2\left(b\:+\:3\right)$

$\frac{9x^{-2}}{y^5z^{-7}}$