Подстановка условия
[src](a^10/a^6)/a^20 при a = 1/4
$$\frac{\frac{1}{a^{6}} a^{10}}{a^{20}}$$
((1/4)^10/(1/4)^6)/(1/4)^20
$$\frac{\frac{1}{(1/4)^{6}} (1/4)^{10}}{(1/4)^{20}}$$
((1/4)^10/(1/4)^6)/(1/4)^20
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