a) $$121^{\frac{1}{2}} = \sqrt{121} = 11$$
б) $$625^{\frac{1}{2}} = \sqrt{625} = 25$$
в) $$(64 \cdot 2^3)^3 = (64 \cdot 8)^3 = 512^3 = (2^9)^3 = 2^{27} = 134217728$$
Ответ: a) 11; б) 25; в) 134217728