$(\frac{n}{a}+\frac{a^2}{n^2}):(\frac{1}{a^{2}n}+\frac{1}{n^3}-<!--\; -\; -->\frac{1}{a{n}^2})-<!--\; -\; -->a^{2}n=\frac{n^3+a^3}{a{n}^2}:\frac{n^2+a^2-<!--\; -\; -->an}{a^2{n}^3}-<!--\; -\; -->a^{2}n=\frac{(a+b)(a^2-<!--\; -\; -->an+n^2)}{a{n}^2}\ast <!--\; \ast \; -->\frac{a^2{n}^3}{a^2-<!--\; -\; -->an+n^2}-<!--\; -\; -->a^{2}n=\frac{(a+n)an}{1}-<!--\; -\; -->a^{2}n=a^{2}n+a{n}^2-<!--\; -\; -->a{n}^2=a{n}^2$
при a = 0,02, n = −10:
$0,02\ast <!--\; \ast \; -->(-<!--\; -\; -->10{)}^2=0,02\ast <!--\; \ast \; -->100=2$