$\int2^{x-7}dx$
$\frac{dy}{dx}=\frac{2+x^2}{x^5}$
$( a ^ { x - 2 } - 5 ) ^ { 2 }$
$\lim_{x\to\infty}\left(\frac{\sqrt{4x^2+3}}{1-2x}\right)$
$\:2\:.\:\left[\:\left(\:-12\:+\:36\:\right)\::\:6\:+\:\left(\:8\:-\:5\:\right)\::\:\left(\:-\:3\:\right)\:\right]\:-\:6$
$\frac{\cos\left(a\right)+\tan\left(a\right)}{\cos\left(a\right)\cdot\tan\left(a\right)}=\cot\left(a\right)+\sec\left(a\right)$
$\frac{5x^9}{x^4}$
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