$log5\left(2x-3\right)^2=6$
$\frac{d}{dx}\frac{e^x-1}{e^x+1}$
$x^2+3x+18=144$
$\lim_{x\to0}\left(\frac{7}{1+x}\right)$
$x\:=\:-4;\:y\:=\:8$
$a^2+3a-10$
$2a+a^2+2a$
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