$20\:-13\:l\:-3\:l\:-l\:9\:l$
$45,0987\:+\:19,089$
$\left(4w+2\right)^2$
$\int\frac{4x-1}{x^3-2x^2+x}dx$
$\lim_{x\to0}\left(\frac{3x^2+27}{\text{x}-3\left(x^2+3x+9\right)}\right)$
$2\cos^2\left(3x\right)-1$
$2\cdot512$
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