$\lim_{x\to\infty}\left(\frac{sin\left(x\right)}{2tan\left(x\right)}.\left(1+tan\left(2x\right)^{\frac{1}{4}}\right)\right)$

$\int\left(3x^3\sqrt{x^4+3}\right)dx$

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

$\int\:\frac{5sen\left(2x\right)}{cos\left(x\right)}dx$

$5a+5b-6a+6b+1a$

$\lim_{v\to\infty}\left(\frac{\sqrt{v}}{\left(\log\:\left(v\right)\right)^3}\right)$

$19.8-8$