Factorize: 4z2−8x+3(a) (2z−1)(2z−3)(b) (2z+1)(3−2z)(c) (2z+3)(3z−1)(d) (z−1)(4z−3)
If x + y + z = xyz. Then
3x−x31−3x2 + 3y−y31−3y2 + 3z−z31−3z3 =