$9.21+10$
$5x-1>3x+7$
$4x^2+4x+10$
$\frac{y'}{x}=-y$
$\lim_{x\to0}\left(\frac{e^{-4x}-\sin\left(-4x\right)-1}{x\cdot\sin\left(5x\right)+2x^2}\right)$
$\sin\left(\tan^{-1}\left(x\right)+2\cos^{-1}\left(x\right)\right)$
$\lim_{x\to2}\left(1+x^2\right)$
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