Simplify Assume That All Variables Represent Positive Real Numbers $\sqrt[3]{16 x}-\sqrt[3]{2 x}+\sqrt[3]{54 x}$

Short Answer

Simplify. Assume that all variables represent positive real numbers.
(a) $\sqrt[3]{16 x}-\sqrt[3]{2 x}+\sqrt[3]{54 x}$
(b) $(\sqrt[3]{16}+3)(\sqrt[3]{4}+4)$
(c) $(x+\sqrt{y})(x-\sqrt{y})$