Odpowiedź:
[tex]a)\ \ 3\sqrt[3]{7}*2(\sqrt[3]{7})^2=3\sqrt[3]{7}*2\sqrt[3]{49}=6\sqrt[3]{7*49}=6\sqrt[3]{343}=6*7=42\\\\\\b)\ \ 5(\sqrt[3]{-6})^2*4\sqrt[3]{-6}=5\sqrt[3]{36}*4*(-\sqrt[3]{6})=-5\sqrt[3]{36}*4\sqrt[3]{6}=-20\sqrt[3]{36*6}=\\\\=-20\sqrt[3]{216}=-20*6=-120\\\\\\c)\ \ (-7\sqrt[3]{-2})^3*\sqrt[3]{-2}=(7\sqrt[3]{2})^3*\sqrt[3]{-2}=7^3*(\sqrt[3]{2})^3*\sqrt[3]{-2}=343*2*\sqrt[3]{-2}=\\\\=686*\sqrt[3]{-2}=-686\sqrt[3]{2}[/tex]