Solution
= $$16^2 - 256^{\frac{1}{4}} + 2197^{\frac{1}{3}}$$
= $$256-\left(4^4\right)^{\frac{1}{4}}+\left(13^3\right)^{\frac{1}{3}}$$
= $$256-\left(4\right)^{4\times\ \frac{1}{4}}+\left(13\right)^{3\times\frac{1}{3}}$$
= $$256-4+13$$
= 252+13
= 265
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