9^1,5 - 1/8^-4/3 + 5/6^4,5 * 1,2^4,5=9^3/2-8^4/3+(5/6*1.2)^4.5=(9^1/2)^3-(8^1/3)^4+(5*0.2)^4.5=3^3-2^4+1^4.5=27-16+1=12
