(6^3*4^2-8^2*27^2):(6^4*2^2-9^3*4^2)
=(6³*4²-8²*27²)/((6²)²*2²-9³*4²)= =4*(2-27)/(3*(4-9))=4*(-25)/(3*(-5))=-100/(-15)= 6,(6)