$\lim_{x\to\frac{1}{2}}\left(\left(1-2x\right)\left(tan\left(\left(\pi\right)\left(x\right)\right)\right)\right)$
$abx^2-acx^1$
$\frac{db}{dt}+3b=60$
$\int6fdf$
$5x^2-10y^2$
$5x^2-13x-6$
$5x^3y\:-\:2x^3y$
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