$\frac{d^2y}{d^2x}\left(5xy+5y^2=10\right)$

$\lim_{x\to0}\left(\left(x+e^{\frac{x}{7}}\right)^{\frac{7}{x}}\right)$

$5\left(x+8\right)$

$\left(x\right)\frac{dy}{dx}-cos\left(y\right)$

$\int\:\frac{x^3+x^2+2x+1}{x^4+3x^2+2}dx$

$5\times3-7\times2-8\times3-2\times2-1$

$\frac{dy}{dx}=\frac{-4a^{-2}}{-2a^{-1}}$