$-2.7-\sqrt{100}$
$x^2+2x+4=7$
$\left(22+4\right)-17+5\left(3^2-5\right)$
$\lim_{h\to0}\left(\frac{e^h-e^{-h}}{\sin\left(h\right)}\right)$
$\lim_{x\to1}\left(\frac{x}{x+1}-\frac{1}{\log\left(x\right)}\right)$
$-4y+7y^2+7x-x+3$
$\frac{10-5sec^2x}{sec^2x}$
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