$\frac{4\:\sec\left(e\right)}{3}+1$
$18ax^2+27a^2y-81y^2$
$\left(a^3\:+\:7x^2\right)^2$
$1+49a^2-14$
$z-4=3$
$f\left(x\right)=\left(\frac{1+2x^2}{5-7x}\right)^4$
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