$\int_0^{\frac{\pi}{3}}\left(3\:sen3x\:sen7x\right)dx$

$2-108$

$\lim_{x\to0}\left(\frac{tan\left(x\right)-sin\left(x\right)}{xsin\left(x\right)tan\left(x\right)}\right)$

$\int\:\frac{x^2+3}{\left(x+2\right)^2x\left(x^2+3x+4\right)}dx$

$\int\left(3sin\left(4x\right)\right)dx$

$0+14+67+106$

$2x\:+\:\left(x\:+\:8\right)$