1)
4n^7*(9n^2-6n-5)
36n^9 -24n^8 -20n^7
2)
7y^2*(8y^6+3y-5y^4)
56y^9+21y^3-35y^6
3)
13m^2*(3m^3-11m+1)
39m^5 - 143m^5 +13 m^2
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Verified answer
1)
4n^7*(9n^2-6n-5)
36n^9 -24n^8 -20n^7
2)
7y^2*(8y^6+3y-5y^4)
56y^9+21y^3-35y^6
3)
13m^2*(3m^3-11m+1)
39m^5 - 143m^5 +13 m^2