5ay^-2a^-4y^3 = 5a^(1-4)y^(-2+3) = 5a^-3*y^1 = 5a^-3y
(c^3x^-4) : (c^-2x^-6) = c^(3-(-2)) x^(-4-(-6)) = c^5 x^2
5ay^-2a^-4y^3 = 5a^(1-4)y^(-2+3) = 5a^-3*y^1 = 5a^-3y
(c^3x^-4) : (c^-2x^-6) = c^(3-(-2)) x^(-4-(-6)) = c^5 x^2