Question

simplify x(x+y²+z)+y²(x+y+z)-z(x+y²)​

Answer 1

$x(x+y²+z)+y²(x+y+z)-z(x+y²) \\ \\ {x}^{2} + x {y}^{2} + xz + x {y}^{2} + {y}^{3} + {y}^{2} z - xz + {y}^{2} z \\ {x}^{2} + 2 {xy}^{2} + {y}^{3} + 2 {y}^{2} z$

By adding

Hope this will be helpful.