Derivative, Urgent pls

z(x) = (e^3x)(2x - 5)(3x + 1)^4

ln z(x) = 3x + ln(2x - 5) + 4ln(3x + 1)

z'(x)/z(x) = 3 + 2/(2x - 5) + 12/(3x + 1)

z'(x)/z(x) = [3(2x - 5)(3x + 1) + 2(3x + 1) + 12(2x - 5)]/(2x - 5)(3x + 1)

z'(x)/z(x) = [18x^2 - 39x - 15 + 6x + 2 + 24x - 60]/(2x - 5)(3x + 1)

z'(x)/z(x) = (18x^2 - 9x - 73)/(2x - 5)(3x + 1)

z'(x) = z(x)(18x^2 - 9x - 73)/(2x - 5)(3x + 1)

z'(x) = (e^3x)(3x + 1)^3(18x^2 - 9x - 73)