Considere os números reais C, M, R e J, tal que:

\( C = \sqrt[3]{\dfrac{2^{28} + 2^{30}}{10}} \)
\( M =\dfrac { 8^{0{,}666...} - 16^{-\dfrac{1}{2}}}{(2{,}666...)^{-1}} \)
\( R = \dfrac{4^{-2} + 4^{\dfrac {1} {2}} \cdot 4^{-3}}{4^{-3}} \)
\( J = \left(\dfrac{2^{\sqrt{27}} \cdot 8^{\sqrt{75}}}{16^{\sqrt{48}}}\right)^{\dfrac{\sqrt{3}}{2}} \)

A soma C + M + R + J é igual a: