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Property 19

\(S=\displaystyle\int\limits_a^b f(x)\cdot dx-\displaystyle\int\limits_a^b g(x)\cdot d(x)\)
\(S=\displaystyle\int\limits_a^b(f(x)-g(x))\cdot d(x)\)

What is the square unit of the shaded area in the given graph?

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