$\lim_{x\to0}\left(\frac{\left(1+x\right)^n}{x}\right)$

$\left(-6\right)\cdot\left(-2\right)\cdot\left(-3\right)\cdot\left(-1-2\right)-\left(-5+1\right)\cdot\left(-4+2\right)$

$-71=\frac{x}{64}$

$\int\sin x\left(\tan x-\sec x\right)dx$

$36m^4-109m^2n^2+49^4$

$\int\:\left(x^2-2\right)\sqrt{\left(x^2+1\right)}dx$

$5,201-5,03$