$\lim_{x\to4}\left(\frac{\sqrt{x^2-16}}{x^2+2x-24}\right)$
$5x^2+25x+5=0$
$\int\left(6y+4t-1\right)dy$
$\frac{\sin w+\tan w}{\cot w+\csc w}=\sin w.\tan w$
$\ln\left(12x\right)$
$9-61+1^2$
$\int x^{-11}dx$
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