Answer:
Explanation:
14
INVALID or 16
The answer would be invalid due to the double addition signs.
However, if you meant to put a 2 in between those signs, it would be:
4+2+2+2+2+2+2
6+2+2+2+2+2
8+2+2+2+2
10+2+2+2
12+2+2
14+2
16
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