`A = (6^14+2^14. 9^8)/(12.8^4. 3^12)`
`A = ((3.2)^14+2^14. (3^2)^8)/(3.4.(2^3)^4 .3^12)`
`A = (3^14. 2^14+2^14. 3^16)/(3.2^2. 2^12. 3^12)`
`A = (2^14. (3^14 + 3^16))/(3^13. 2^14)`
`A = (3^14 + 3^16)/3^13`
`A = (3^13. (3 + 3^3))/3^13`
`A = (3^13. 30)/3^13`
`A = 30`
- Vậy `A = 30`