$\frac{dy}{dx}=e^x\sqrt{1+y^2}$

$1,39\cdot2$

$f\left(x\right)=\frac{1+2tan\left(2\right)}{sec\left(2\right)}$

$\lim_{x\to\pi}\left(\frac{cos2x-sin2x-1}{\pi^3-x^3}\right)$

$\lim_{x\to\pi}\left(\left(x+\pi\right)cscx\right)$

$\frac{3x-2}{x^3\left(x^2+4\right)}$

$\int\left(\frac{1}{x^2\sqrt{36x^2-25}}\right)dx$