In the following code snippet:
<title>Calculating Loan Payments</title>
<center><h1>Calculating Loan Payments</h1></center>
<center><table style="font-size: 20px;">
<tr><td>1) </td><td><b>F</b> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;= </td><td></td><td>A * (1 + i)<sup>n - 1</sup></td><td>+A * (1 + i)<sup>n - 2</sup></td><td> + . . . . </td>
   <td>+A * (1 + i)<sup>2</sup></td><td>+A * (1 + i)<sup>1</sup></td><td>+A</td></tr>
each term in the equation has a smaller superscript (exponent) except for the last one which as a value of simply +A. However, it looks like it is part of the exponent for the next to last term.

What did I miss?