$x\cdot ln\left(x\right)\frac{dy}{dx}=\left(\frac{y+1}{x}\right)$

$\lim_{x\to0}\left(2x.\ln\left(x^2\right)\right)$

$\:\left(f\:-\:g\right)\left(2\right)$

$\left(6x+y\right)^3$

$\frac{d}{dx}\:y=\:-3\sqrt[4]{2-9x}$

$\left[+21+\left(17-15\right)-54\right]-\left\{11\right\}$

$\int_{\pi}^{5\pi}\left(-cos\left(x\right)+sen\left(x\right)\right)dx$