Question

fast as possible guys correct answer needed full step by step​

Answer 1

$2{x}^{2} y + 3 {y}^{2} z + 4zx - 4 {x}^{2} y - 3 {y}^{2} z - 7zx = 2{x}^{2} y - 4 {x}^{2} y + 3 {y}^{2} z - 3 {y}^{2} z + 4zx - 7zx = - 2 {x}^{2} y - 3zx$