y = (15x⁴ - 4x⁵)¹⁰¹
y' = ((15x⁴ - 4x⁵)¹⁰¹)'
g = 15x⁴ - 4x⁵
y' = (g¹⁰¹)' * (15x⁴ - 4x⁵)' = 101g¹⁰⁰ * (15 * 4x³ - 4 * 5x⁴) = 101(15x⁴ - 4x⁵)¹⁰⁰ =
= (6060x³ - 2020x⁴) * (15x⁴ - 4x⁵)¹⁰⁰
