$\frac{d^2}{dy^2}\left(xye^{x+y}\right)$

$\left(a^4b^4\right)^{\frac{1}{5}}$

$-312-\left(-213\right)$

$\frac{\frac{1}{x+2}-\frac{1}{2}}{\sqrt{x+1}-\sqrt{1}}$

$e^y\sin\left(x\right)dy+\left(e^y+1\right)\cos\left(x\right)dx=0$

$x^2-42x+196$

$\frac{dy}{dx}=\sqrt{2y+23}$