$\lim_{x\to\frac{\pi}{2}}\left(\frac{\ln\left(\sin^2\left(x\right)\right)}{\left(\frac{\pi}{2}-x\right)^2}\right)$
$2x^3+7x^2+7x+2$
$\sqrt{10^2-6^2}$
$\frac{7^5x\:7^3}{7^2}$
$3x^2-4x-6-5x+8-2x^2$
$\frac{dy}{dx}=\frac{1}{5x^4}$
$-657-854-83-1248-3568$
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