A=54^(1/3)+(3/2)4^(1/6)+(-1/4)^(1/3)
=(2×3^3)^(1/3)+3×2^(-1)2^(1/3)-2^(-2/3)
=3×2^(1/3)+3×2^(-2/3)-2^(-2/3)=3×2^(1/3)+2×2^(-2/3)
=3×2^(1/3)+2^(1/3)=4×2^(1/3)=2^(7/3)