$\left(1-x\right)x$
$2\cos^2x-3\cos x+1=0$
$2a\cdot\left(4a^3-3a^2\right)$
$\lim_{n\to0}\left(\frac{x^n}{2n-1}\right)$
$1-9x^2$
$2x+3\cdot2x+3$
$\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)+\left(m+2n\right)$
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