$3^2+7^2$
$\frac{d}{dx}y=\frac{2x^2-3x+1}{2x+1}$
$9y^2\:-\:30y^2\:+\:25$
$\left(2+\frac{2i}{n}\right)^4$
$\lim_{x\to0}\left(2+e^x\right)^{e-x}$
$\log\left(x^3\sqrt{\frac{x}{y}}\right)$
$21q-39=234$
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