Answer
It makes sense.
Work Step by Step
The given expression $\sum\limits_{i=1}^{8}{(i+7)}$ shows $(i+7)$ is the single term, whereas the expression $\sum\limits_{i=1}^{8}{i+7}$ indicates that $ i $ is the single term and $7$ is the addition to the whole sequence.
Hence $\sum\limits_{i=1}^{8}{(i+7)}=92$
Whereas $\sum\limits_{i=1}^{8}{i+7}=43$
