$\lim_{x\to\infty}\left(\frac{10\left(5+3x\right)}{1+0.004x}\right)$

$\int e^{2r}sen\left(e^{2r}\right)dr$

$7\left(b-2b\right)+3$

$\frac{\left(x^5\:\:-\:3.5x^4\:\:+\:2.75x^3\:\:+\:2.125x^2\:\:-\:3.875x\:\:+\:1.25\right)\:}{\left(x^2\:+\:0.5x\:-\:0.5\right)}$

$-86+-455$

$-15\:+\:-25\:+\:-35\:+-45\:+-55$

$x^2+14x-1632$