$\sqrt{147}$
$a+a-1$
$y+45=30$
$2x^2-288y^2$
$m^2x^2-x^2\:-m^2a^2+a^2$
$\sqrt{\left(-2-0\right)^2+\left(8-4\right)^2}$
$\ln\left(\frac{1}{e^{13}}\right)$
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