$\frac{dx}{dy}=2xe^{-y}$

$\left(sec\left(x\right)-cos\left(x\right)\right)\left(\frac{cos}{sin}\right)$

$\int\frac{x^2}{\left(x+8\right)\left(x-3\right)}dx$

$\lim_{x\to\infty}\left(\frac{5+3\sin\left(x\right)}{2x}\right)$

$\lim_{x\to\infty}arctan\left(-x^2\right)$

$\int sec6w\cdot tan6w\:dw$

$\frac{303.74}{8.21}$