$6x^2-19x-7$
$-1\left(1+3-7+2-8+1\right)$
$\left(9a^2+12a+24\right)$
$-2\:+\:-65\:+\:2$
$\sqrt[4]{625\cdot81}$
$\lim_{x\to4}\left(\frac{x^2}{x^2+2x-24}\right)$
$\sin^2\left(30\right)+\cos^2\left(30\right)=1$
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