Question

$\sqrt{25 + 4 - 5 + 4 { }^{2} } + 25 - \sqrt{ \sqrt[3]{ - 64 \\ } }$
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Answer 1

$\sqrt{25 + 4 - 5 + {4}^{2} } + 25 - \sqrt[3]{64} = \\ \sqrt{25 + 4 - 5 + 16} + 25 - 4 = \\ \sqrt{40} + 25 - 4 = \\ \sqrt{40} + 21 = \\ 2 \sqrt{10} + 21$