Question

$(x + y) {3} + (x - y) {3} + 6x( {x}^{2} - {y}^{2})$

Answer 1

${(x + y)}^{3} + {(x - y)}^{3} + 6x \times ( {x}^{2} - {y}^{2} ) \\ {x}^{3} + {x}^{2} y + 3x {y}^{2} + {y}^{3} + {x}^{3} - {3x}^{2} y - {y}^{3} + {6x}^{3} - {6xy}^{2} \\ {8x}^{3} + 0 \\ {8x}^{3}$