Answer
\[
\int_{-1}^{2} x^{2} d x
\]
Work Step by Step
\[
\int_{-1}^{2} x^{2} d x
\]
Replace the sum with an integer sign with the limits $ a $, $ b;\ \Delta x_ {k} $ with $ d x $; and $ x_ {k} ^ {*} $ with $ x $.
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