$\lim_{x\to0}\left(\frac{sin2x}{2x^2+x}\right)$
$x^2+8x-8=0$
$exp\left(2y\right)dx+x^2ydy=0$
$\cot\left(x\right)=0.3$
$\int\left(\frac{x^2}{5x^3+8}\right)dx$
$9x^2+6x+1=0$
$\frac{45}{5}$
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