$\sin\left(-t\right)=-\:\sin t$

$-8-8x=-24$

$\left[-21+\left(17-15\right)-54\right]-\left\{-11\right\}$

$x^2-8x+15>0$

$\sqrt[4]{x^{12}}y^{24}$

$\frac{1}{1-\sin^2\left(x\right)}-\tan\left(x\right)\frac{1}{\cot\left(x\right)}$

$\int\frac{e^{\cos\left(2\right)^2}}{\csc\left(2x\right)}dx$