Explicación paso a paso:
2-x3 - 5x3. 3. x - 2x. 4. 5xy - 8xy. 5. 1. 2 x2 - 5. 4 x2. 6. xy2 + 3. 8 xy2. 7. -5. 6 mn2 + 3 ... -5x - 3y - 7z +1+7x - 2z - 3=2x - 3y + (-9)z + (-2).
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Explicación paso a paso:
2-x3 - 5x3. 3. x - 2x. 4. 5xy - 8xy. 5. 1. 2 x2 - 5. 4 x2. 6. xy2 + 3. 8 xy2. 7. -5. 6 mn2 + 3 ... -5x - 3y - 7z +1+7x - 2z - 3=2x - 3y + (-9)z + (-2).