$82-2^4$

$11\cdot\left(-1\right)+11\cdot\left(5\right)$

$\left(\sec\left(x\right)-\tan\left(x\right)\right)\left(1+\sin\left(x\right)\right)=\sin\left(x\right)$

$\infty+75$

$1+\tan x+\sec x$

$x^9+8x^{12}$

$\frac{d}{dx}\sqrt{\frac{\left(x+1\right)\left(x-2\right)}{\left(x+3\right)}}$