$\left|-300\right|$

$-4\left(8x+3\right)$

$\frac{\cos\left(x\right)}{\sin\left(x\right)}-\frac{\csc\left(x\right)}{\cos\left(x\right)}$

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

$\left(2\sin e-2\cos e\right)^2$

$\lim_{x\to81}\frac{-3\:+\sqrt[4]{x}}{9+\sqrt{x}}$

$888+1,777$