$-42-25-12-5-6-3$

$\int\frac{2x}{x^2-25}dx$

$\frac{2x}{10}\cdot\frac{2x^3}{3}$

$\lim_{n\to\infty}\:\left(\sqrt{n}\left(sen\left(\frac{1}{\sqrt{n}}\right)\right)\right)$

$\frac{\left(x^2+4x+100\right)}{x+20}$

$-8+2-6+5-2+2\left(-3\right)$

$\int ( x + 5 ) ^ { 2 } d x$