$\frac{11x}{x+1}-\frac{2x+4}{x+1}$

$9x-8y+5y$

$2x-x-1$

$\int\frac{\cos^2x}{\sec x}dx$

$\left(\frac{1}{\cos\left(x\right)}+\frac{\sin\left(x\right)}{\cos\left(x\right)}\right)\left(\sin^2\left(x\right)+\cos^2\left(x\right)\right)$

$y=\sqrt[4]{x^5}+x$

$4-\left(8-2\right)-\left(3-13\right)$