$4\left(3x-1\right)+x-1$
$\int\frac{sec^2\left(x\right)}{tan^2\left(x\right)-49}dx$
$-9-4+2$
$\lim_{x\to3}\left(\frac{\sqrt{x+8}-\sqrt{11}}{x-3}\right)$
$\tan67.27$
$\frac{x^3+2x^2+5x+12}{x+2}$
$7x^2-15x^3+12x^2-15x^3$
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