15ab²-5ab = 5ab(3b-1).
24x²y+36xy² = 12xy(2x+3y).
3х⁴-6х+9х⁵ = 3x(x³-2+3x⁴).
-4х⁸+18х¹⁵ = 2x⁸(-2+9x⁷) = 2x⁸(9x⁷-2).
3х⁴-6х³+9х⁵ = 3x³(x-2+2x²).
8ab³-12a²b-24a²b² = 4ab(2b²-3a-6ab).
18y⁵-12xy²+9y³ = 3y²(6y³-4x+3y).
-14ab³c-21a²bc²-28a³b²c = -7abc(2b²+3ac-4a²b).