`(16. 8^3 . 27^3 - 24. 6^3)/(12^7 .6-2^8 .240.9^4)`
=`(2^4 .(2^3)^3 . (3^3)^3 -3.2^3 .(2.3)^3)/((2^2 .3)^7 .2.3 - 2^8 .2^4 .3.5 .(3^2)^4)`
=`(2^4. 2^9 . 3^9 - 3. 2^3. 2^3 .3^3)/(2^14 . 3^7 . 2.3 -2^12 .3.5 . 3^8)`
=`(2^13 .3^9 - 3^4 . 2^6)/(2^15 .3^8- 2^12.3^9.5)`
=`(3^4 . 2^6.(2^7. 3^5-1))/(2^12.3^8.(2^3-3.5))`
=`(2^7 .3^5 -1)/(2^6 .3^4 . -7)`