IV.- Suma y resta de radicales

676.
\large 5\sqrt[3]{a^{2}b}+\sqrt[3]{a^{2}b}-2\sqrt{bc^{2}}
677.
\large 7a^{2}\sqrt{2b} +8\sqrt{bc}-3a^{2}\sqrt{2b}+\sqrt[3]{bc}
678.
\large 2\sqrt[4]{2a^{3}}-(-\sqrt[4]{32a^{3}}+4\sqrt[3]{a}-\sqrt[3]{64a})
679.
\large \sqrt{48ab^{2}+b\sqrt{75a}}
680.
\large \sqrt{50}-\sqrt{18}-\sqrt{32}-\sqrt{72}-\sqrt{2}
681.
\large 2\sqrt{45}-3\sqrt{5}+4\sqrt{20}
682.
\large 3\sqrt{12}+4\sqrt{75}-2\sqrt{27}
683.
\large 4\sqrt{\frac{2}{25}}-3\sqrt{18}+6\sqrt{\frac{2}{9}}-\frac{2}{3}\sqrt{\frac{18}{16}}
684.
\large (2a\sqrt[3]{a^{2}b}+5b\sqrt{a})+ \large (3b\sqrt{a}-4a\sqrt[3]{a^{2}b}+5ab\sqrt{ab})- \large (2ab\sqrt{ab}-3a\sqrt[3]{a^{2}b})
685.
\large (\sqrt[n]{5a(1-a)^{2}}-2\sqrt{1+a}+\frac{2}{a})+ \large (3a\sqrt{2}-(1-a)\sqrt[2n]{25s^{2}}+a\sqrt{\frac{8}{1}}+\sqrt[3]{5b^{3}})+
\large (\sqrt{4a+4}-b\sqrt[3]{5}-\sqrt{32a^{2}}-\sqrt{a^{-2}})
686.
\large (\frac{2}{a}\sqrt{1-a}-\sqrt[3]{16a^{-2}}+\frac{5a}{m}+\sqrt[4]{(1-a)^{2}})- \large (\frac{5am^{-1}}{1}-2\sqrt[3]{2a^{-2}})
687.
\large (2a\sqrt{1-b}+\frac{1}{2}a\sqrt{2a}-3\sqrt{a^{2}-a^{2}b})+ \large (\frac{1}{5}\sqrt{50a^{3}}-a\sqrt{\frac{1-b}{4}}-\frac{a}{2}\sqrt{2a})

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