Ответ:
1) 7m(m²+4)-3m(2-m²) = 7m³+28m-6m+3m³ = 10m³+22m
2) -2t(t²-t³)-t(t³-5t²) = -2t³+2t⁴-t⁴+5t³ = 3t³+t⁴
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Ответ:
1) 7m(m²+4)-3m(2-m²) = 7m³+28m-6m+3m³ = 10m³+22m
2) -2t(t²-t³)-t(t³-5t²) = -2t³+2t⁴-t⁴+5t³ = 3t³+t⁴