$\int_{-\frac{\pi}{3}}^{\frac{\pi}{3}}\left(4\sec\left(x\right)\tan\left(x\right)\right)dx$

$\left(2\:+\:9\right)\:+\:\left(2.3\:-\:1\right)$

$\frac{3x^5-x}{x}$

$c^2-c-6$

$\left(x^2y^3+6\right)\left(x^2y^3-8\right)$

$x8-25x^5-24x$

$4\sec\left(x\right)+4=-2\sec\left(x\right)-8$