$\sec^{\frac{2}{3}}\left(\frac{x}{x-1}+e^{5x}\right)$
$\frac{\sin^3\left(5x\right)}{\cos\left(5x\right)}+\sin\left(5x\right)\cdot\cos\left(5x\right)=1$
$y^2-14y+47$
$2+x-y+3z+y-2x+6$
$-3\left(-2+2\right)$
$x^2-14x+63=0$
$20y^2-y-7$
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