$\lim_{x\to0}\left(\frac{\sqrt{\left(x^2+11\right)}-6}{x^2-25}\right)$

$3x^6-6x^4+12x^3$

$\sqrt[3]{63.999}$

$\lim_{n\to\infty}\left(\frac{n^2xe^{\left(-n^2x^2\right)}}{x^2+1}\right)$

$\frac{c}{9}+36=45$

$\int y\sin\left(1-y^2\right)dy$

$-\frac{5}{39}sin5xcos8x+\frac{8}{39}sin8xcos5$