Medium
Consider the sum 4+25+64+1214+25+64+1214+25+64+121. Which expression is equal to the above sum?
∑i=03(3i+2)2\sum_{i=0}^3(3 i+2)^2∑i=03(3i+2)2
∑i=03(3i+1)2 \sum_{i=0}^3 (3 i+1)^2 ∑i=03(3i+1)2
∑i=03(i2+2i+4)\sum_{i=0}^3(i^2+2 i+4)∑i=03(i2+2i+4)
None of the above
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