$20+20+20+20+20+20+27+10$
$\left(3+3+3+3+3+3+3+3+3+3+3\right).\left(-2\right).\left(-5\right)$
$35,97+8,921+0,102$
$\frac{b^{4x}y^{a+1}}{4}^2$
$5x\left(v+6\right)$
$\frac{20n^3+15n^2}{20n^2+10n}$
$\frac{dc}{dx},\:e^{xc}=xyc$
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