$\lim_{x\to2}\left(\frac{x^2+3x-10}{3x^2-2x-2}\right)$
$\frac{20x^3-8x^2y}{4x^2}$
$3x^3+9x^2+6x$
$sena+cosa=1+\frac{tga}{seca}$
$\frac{2}{-\sqrt{2}}$
$\frac{\left(1+tan\left(x\right)\right)}{1+cot\left(x\right)}$
$\left(1-x\right)+5c\left(12-x\right)$
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