$\frac{s+5}{\left(s+1\right)\left(s+4\right)}$

$\int e^{\frac{y}{3}}\sin\left(\pi\left(y\right)\right)dy$

$\sqrt{x}\:\:\:a=16$

$\frac{d^2y}{dx^2}=-x^2$

$\int_0^{\frac{1}{2}}\frac{2x}{x^3-x^2-x+1}dx$

$\lim_{x\to\infty}\left(\frac{x}{x-k}\right)$