$\lim_{x\to0}\left(14sin\left(13x\right)ln\left(13x\right)\right)$

$\int\left(x^3-4\right)^{-5}\cdot3x^2dx$

$\left(xb99a+2\right)\left(x+3\right)$

$\lim_{x\to1}\left(\frac{\left(x^2+6x-7\right)}{lnx}\right)$

$4,36\cdot10$

$88\tan^2\left(60\right)$

$\lim_{x\to0}\left(\frac{sin\left(x\right)}{x^5}\right)$