The cube volume is calculated using the formula page [i]a[/i] length to the third, i.e. [math] V = a^3.[/math] The square side length is obtained from the area by taking the square root of the result. In a similar way, the length of the page is obtained by taking [color=#0000ff]cube root[/color]. Cube root is denoted by [math] \sqrt[3]{}.[/math][br] [br][color=#0000ff]Examples:[/color][br][br]  1.  [math]\large \sqrt[3] 8=\sqrt[3]{2^3}=2[/math][br] [br]  2.  [math]\large \sqrt[3] {-8}=\sqrt[3]{(-2)^3}=-2[/math][br] [br] 3.  [math]\large \sqrt[3] {216}=\sqrt[3]{6^3}=6[/math][br][br] 4.  [math]\large \sqrt[3] {2^3+3^3}=\sqrt[3]{8+27}=\sqrt[3]{35}[/math][br][br] 5.  [math]\large \sqrt[3] {3^3+2^3}=\sqrt[3]{27-8}=\sqrt[3]{19}[/math][br][br]Also in the case of cube root, the addition and subtraction must be calculated before taking the cube root.