$\int_0^x\left(\frac{x}{2}\right)dx$

$\lim_{x\to\infty}\left(\left(1+\frac{.04}{n}\right)^{2n}\right)$

$-n-8=-2n$

$\int\frac{2}{3}\left(1-x^2\right)^{\frac{3}{2}}dx$

$3\left(x+\frac{1}{2}\right)-\frac{1}{3}x+5$

$-\frac{2x^3}{3}+\frac{5x^3}{3}+\frac{x^3}{3}$

$tan\left(x\right)+cot\left(x\right)=\frac{1}{sen\left(x\right).cos\left(x\right)}$