$\int99xdx$

$\int\frac{\log5\:x}{x}dx$

$m^4-6m^2+1$

$\left(\sin a\:+\cos a\right)^2-\tan a\:\cdot\:\cos^2a=1+\sin a\cdot\cos a$

$\left(2\sqrt{m}-\sqrt{3}\right)\left(\sqrt{3}+2\sqrt{m}\right)$

$\sec x+\cos^2x$

$\left(\left(6\cdot1\cdot1\right)+\left(\left(-4\right)\cdot5\cdot1\right)+\left(8\cdot\left(-1\right)\cdot\left(-1\right)\right)\right)-\left(\left(8\cdot1\cdot1\right)+\left(\left(-4\right)\cdot\left(-4\right)\cdot1\right)+\left(6\cdot5\cdot\left(-1\right)\right)\right)$