[(4³)^½ * 27^⅔] / [(16^1/4)³]= [ 4^3/2*3²] / [(16)^3/4]= [4^3/2*9] / [4^6/4] = 4^½*9=2*9 = 18
[(-64)^⅓*100^3/2] /[(-27)^⅓*(-8000)*(-2/3)]= [-4*√1000000] / [-3*(-8000)*(-2/3)] = [-4*1000] / [24000*(-2/3)] =[-4000]/[-16000]=¼=0,25
(-125/8)^-⅔*(16/49)^-½ = ∛(-8/125)²*√(49/16) = ∛64/15625*7/4 = 4/25*7/4=7/25=0,28