в) (−2x³)⁴ ⋅ 10x² = ((-2)⁴ ⋅ (x³)⁴) ⋅ 10x² = (16 ⋅ x¹²) ⋅ 10x² = (16 ⋅ 10) ⋅ (x¹² ⋅ x²) = 160x¹⁴
Ответ: 160x¹⁴