$\sqrt{a^2+x^2}\cdot1$
$\sqrt[3]{81x^7}y^9$
$y^2+14y+24$
$\left(x+4\right)\left(x^2-4x+16\right)+\left(x-4\right)\left(x^2+4x+16\right)$
$\lim_{x\to\pi}\csc\left(x\right)$
$\left(4\cdot2\right)^{12}$
$\int\frac{1}{\sqrt{x^2+6x-7}}dx$
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