In my school,I have many friends but Ha is my best friend.Ha is very tall.she is 1,45meter tall.she is nice and kind.she often help friends in my class.she likes singing and dacing.she want to be a singer in the future.I love Ha very much...

​

Ta có \(B=2014^{2014}.\left(2014+1\right)=2014^{2014}.2015\)

          \(C=2015.2015^{2014}\)