$\"\"$

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The integral is $\"\"$ .

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Apply sum rule of integration: $\"\"$ .

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$\"\"$

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Apply constant rule of integration: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Graph of function: $\"\"$ .

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$\"\"$

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Observe the graph:

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The integral value is $\"\"$ .

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$\"\"$

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$\"\"$ .