1. Find the sum

1. Add: \(5m (3 – m)\) and \(6m^2– 13m\)
 
2. Add: \(4y(3y^2+ 5y – 7)\) and \(2(y^3– 4y^2+ 5)\)
Answer variants:
\(m^2+2m\)
\(m^2-2m\)
\(14y^2+4y^2+28y-10\)
\(14y^3+12y^2+28y+10\)
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