Original
Write out what is meant by the following:
{{MATH_29}}
{{CMD_30}}
Here, the index {{MATH_31}} takes the values {{MATH_32}}, {{MATH_33}}, {{MATH_34}}, and {{MATH_35}}. We'll plug those each into {{MATH_36}} and add them together.
{{MATH_37}}
{{CMD_38}}
{{CMD_39}}