$x\frac{dy}{dx}+y=\frac{1}{y^3}$
$25x^2+10x+25$
$14.257\cdot21.5$
$\frac{64a^3-12b^3}{4a-5b}$
$\lim_{n\to\infty}\:\frac{\left(1^{n+2}+1\right)}{1^n+1}$
$3x^3-18$
$2 ( 3 x ^ { 2 } ) ^ { 3 }$
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