$\int\left(\frac{\sqrt{a}-\sqrt{x}}{\sqrt{x}}\right)^2dx$

$\cos\left(x+\frac{\pi}{3}\right)=-1$

$\:y'\:+\:xy\:=\:0$

$\frac{s+3}{\left(s-2\right)\left(s+1\right)}$

$\lim_{x\to\infty}\left(\frac{\sqrt{x}}{ln\left(x+1\right)}\right)$

$-2+4\left(-2+5\right)$

$\left(4x^2-y^2\right)^2$