$\frac { z } { 3 } = 17$
$5+4-6+9+19-18+15-49$
$sec^2\left(3x\right)=4$
$\int\frac{e^x}{3}dx$
$0,23+1$
$\frac{14x^2-12+22x}{7x-3}n$
$\lim_{x\to0}\left(\frac{\cos\left(6x\right)}{x^2-1}\right)$
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