$\lim_{x\to0}\frac{\ln\left(1+\sin\left(x\right)\right)}{x}$
$\int_0^{ln2}\left(\frac{e^x+e^{-x}}{2}\right)dx$
$9x^2-12x-10$
$x^2-4x+1\cdot4x$
$5418-9$
$\lim_{x\to0}\left(\frac{sen\left(x\right)}{x}^{x^{-2}}\right)$
$\frac{d}{dx}\left(x^2+4y^2=25\right)$
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