For Exercises 45–50, write out the first three terms and the last term. Then use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.

Verified step by step guidance

1. Identify the sequence: The given expression is $\sum _{i=1}^{17}(5i+3)$, which represents an arithmetic sequence.
2. Find the first term: Substitute $i=1$ into the expression $5i+3$ to get the first term.
3. Find the second term: Substitute $i=2$ into the expression $5i+3$ to get the second term.
4. Find the third term: Substitute $i=3$ into the expression $5i+3$ to get the third term.
5. Find the last term: Substitute $i=17$ into the expression $5i+3$ to get the last term.