$\sin\left(x\right)\cdot\left(-\sin\left(x\right)\right)$

$\int_1^{\infty}\left(\frac{sen\left(x\right)}{x^2}\right)dx$

$\lim_{x\to0}\left(\frac{x+\sqrt[2]{x+1}}{2x}\right)$

$1.200-435$

$\frac{\left(-1^n\right)n\left(x-1\right)^n}{3^n}$

$\int\:x^2\sqrt{x^3+25}\:dx$

$208.18\cdot5$