$-7x^2\:-\:x\:+\:6x\:+\:x^2$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{1+sec\left(x\right)}{tan\left(x\right)}\right)$
$\left(-22\right)\:-\:\left(-33\right)$
$\sqrt{64\cdot121}$
$4x^2-12x+9^7$
$a^2+8a$
$7^{\frac{5}{7}},\left(\sqrt{7}^5\right)$
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