高中数学问题，急！下面的问题我做得对吗？计算：(1)[〖125〗^(2/3)+(1/16 )^(-1/2)+〖343〗^

高中数学问题，急！
下面的问题我做得对吗？
计算：
(1)[〖125〗^(2/3)+(1/16 )^(-1/2)+〖343〗^(1/3) ]^(1/2)
=[(5^3 )^(2/3)+(1/4 )^(2×-1/2)+〖(7〗^3 )^(1/3) ]^(1/2)
=[25+4+7]^(1/2)
=〖36〗^(1/2)
=(6^2 )^(1/2)
=6
(2)[1/4(〖0.027〗^(2/3)+50×〖0.0016〗^(3/4))]^(-1/2)
={1/4[(〖0.3〗^3 )^(2/3)+50×(〖0.2〗^4 )^(3/4)]}^(-1/2)
=[1/4(0.09+50×0.008)]^(-1/2)
=[1/4(0.09+0.4〖)]〗^(-1/2)
=[1/4×0.49]^(-1/2)
=[0.25×0.49]^(-1/2)
=〖0.1225〗^(-1/2)
=〖0.35〗^(2×-1/2)
=1/0.35
请详细列出解题过程