$\lim_{x\to0}\left(\frac{x^2-1}{\sin\left(x-1\right)}\right)$
$\frac{dy}{dx}=\frac{x}{\sqrt{x+1}}$
$ex^2+x^3$
$y^2-10y-24$
$\left(8\cdot20\right)-\left(8\cdot1\right)$
$\int_1^{\pi}\left(cos2x\right)dx$
$\frac{6x^3+23x^2+11x-5}{2x+3}$
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