原式=1/0.25×(3^1/4/2^1/2×4^1/4/27^1/4)+lg(1/5)/lg2×lg(1/8)/lg3×lg(1/9)/lg5
=4×(1/9^1/4)-lg5/lg2×(3lg2)/lg3×2lg3/lg5
=4/√3-6
=4√3/3-6