$\int e^{\frac{x}{2}}\cdot\cos\left(\frac{x}{4}\right)dx$

$\frac{\left(4m^3+2m^2-4m+3\right)}{2m+3}$

$\left(sec\:0\:+\:1\right)\left(sec\:0\:-1\right)\:=\:tan^2\:0$

$5x+7y+11x+3y$

$\:\frac{2\left(x^2+y^3\right)}{x^3+y^2}$

$\frac{6x+2}{3x-1}\le5$

$\frac{x^2+12x+27}{x^2-9}$