$\lim_{x,y\to0,0}\left(\frac{x^3\:+\:y^3}{x^2+y^2}\right)$

$\lim_{x\to-5}\frac{10x^2+50x}{x^2-25x}$

$\lim_{x\to\infty}\sqrt{\frac{1+x}{x^2}}$

$\int\frac{\left(ln\left(x\right)\right)^{46}}{x}dx$

$-8a-6a$

$\frac{dy}{dx}=\frac{y^2-xy-3x^2}{x^2}$

$\frac { ( 3 ) - 2 } { 3 \cdot ( 3 - 3 ) }$