The expression is $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Let $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Where $\"\"$

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Integral factor (IF) $\"\"$

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$\"\"$

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$\"\"$

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General solution $\"\"$

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$\"\"$

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$\"\"$

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Since $\"\"$

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$\"\"$

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The general solution is $\"\"$ .