2+2+2²+2³ ... +2^7	Answers:
A) 2^9  B) 2^10  C) 2^16  D) 2^35  E) 2^8
2+2=2^2   2^2+2^2=(2^2)*(1+1)=2^3   2^3+2^3=(2^3)*(1+1)=2^4   so you can notice the pattern... in the end you will have 2^7+2^7, which will give you 2^8   Answer 2^8
<result>E</result>
2+2+2²+2³ ... +2^7