Answer:
1.6-3b^3c^2
2.-8x^3+6x^2-5x
3. 7m^2n^3-11m^3n^4-3mn
5.3a^2b^5-5a^2b^2+4ab
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Answer:
1.6-3b^3c^2
2.-8x^3+6x^2-5x
3. 7m^2n^3-11m^3n^4-3mn
5.3a^2b^5-5a^2b^2+4ab