`@` `color[#480209][d]``color[#81020E][t]``color[#A80111][t]`

Đáp án:

`C=((2/5)^7*5^7+(9/4)^3:(3/16)^3)/(2^7*5^2+512)`

`C=((2/5*5)^7+(9/4:3/16)^3)/(2^7*5^2+512)`

`C=(2^7+12^3)/(2^7*5^2+2^9)`

`C=(2^7+(6*2)^3)/(2^7*(5^2+2^2))`

`C=(2^7+2^3*6^3)/(2^7*29)`

`C=(2^3(2^4+6^3))/(2^7*29)`

`C=(2^3*232)/(2^7*29)`

`C=232/(2^4*29)`

`C=232/464=1/2`