$\frac{3x^2+2x^2-1}{4x}$
$\lim_{n\to\infty}\left(\frac{n^2+3n+2}{n^2+2}\right)$
$768-54+3$
$-5+18:\:\left(-9\right)$
$\int\frac{x^3}{4+x^2}dx$
$12a+3a^2-8a+4a^2$
$\left(q-10\right)\left(q+8\right)$
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