5+7+9+11+...+211=
=5 + 5+1*2 + 5+2*2 + 5+3*2 + . . . + 5+103*2 =
=5*104 + 2*(1+2+3+...+103)=520 + 2* (103*104)/2 = 520 + 10712 = 11232
