$\sin^2x-3\sin x-4=0$
$4+4x\sqrt{1}+4x^{2}$
$\lim_{x\to0}\left(\frac{5\ln\left(x^2\right)}{x^2-1}\right)$
$\frac{x}{2}+16=36$
$0.5-47.90$
$\lim_{x\to a}\left(\frac{bx^2-ba^2}{\sqrt[2]{x}\:-\sqrt[2]{a}}\right)$
$\int ye^{-2y}dy$
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