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प्रश्न
Add the following:
\[x - 3y - 2z\]
\[ 5x + 7y - z\]
- 7x - 2y + 4z
_______________
उत्तर
\[x - 3y - 2z\]
\[ 5 x + 7y - z\]
- 7x - 2y + 4z
\[ - x + 2y + z\]
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