Question

[Oh Sehun]

A = \(\left(6^9.2^{10}+12^{10}\right):\left(2^{19}.27^3+15.4^3.9^4\right)\)

B = \(2^{2013}-2^{2012}-2^{2011}-...-2-1\)

C = \(\frac{1}{2}+\left(\frac{1}{2}\right)^2+\left(\frac{1}{2}\right)^3+...+\left(\frac{1}{2}\right)^{50}\)

anh chị ơi ! giúp em với ạ