$a^2+16a+48$
$\lim_{h\to0}\left(\frac{tan3\left(x-h\right)-tan3\left(x\right)}{h}\right)$
$742-157$
$cos^2x.sec\:x=\frac{2}{5}$
$12x;x=3$
$\frac{1+\cot\left(c\right)}{\csc\left(c\right)}$
$12\le16-\frac{1}{8}v$
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