$\left ( \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right ) ^ { \color{#FF6800}{ 3 } } - \left ( x - 2 \right ) \left ( x ^ { 2 } + 2 x + 4 \right )$
$ $ Expand an equation $ $
$\color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ x } ^ { \color{#FF6800}{ 2 } } + \color{#FF6800}{ 3 } \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } - \left ( x - 2 \right ) \left ( x ^ { 2 } + 2 x + 4 \right )$
$x ^ { 3 } - 3 x ^ { 2 } + 3 x - 1 \color{#FF6800}{ - } \left ( \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \right ) \left ( x ^ { 2 } + 2 x + 4 \right )$
$ $ Change the symbol of each term in parentheses when there is a (-) symbol in front of parentheses $ $
$x ^ { 3 } - 3 x ^ { 2 } + 3 x - 1 + \left ( \color{#FF6800}{ - } \color{#FF6800}{ x } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \right ) \left ( x ^ { 2 } + 2 x + 4 \right )$
$x ^ { 3 } - 3 x ^ { 2 } + 3 x - 1 + \left ( \color{#FF6800}{ - } \color{#FF6800}{ x } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \right ) \left ( \color{#FF6800}{ x } ^ { \color{#FF6800}{ 2 } } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ x } \color{#FF6800}{ + } \color{#FF6800}{ 4 } \right )$
$ $ Organize the expression with the distributive law $ $
$x ^ { 3 } - 3 x ^ { 2 } + 3 x - 1 \color{#FF6800}{ - } \color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } + \color{#FF6800}{ 8 }$
$\color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ x } ^ { \color{#FF6800}{ 2 } } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } \color{#FF6800}{ + } \color{#FF6800}{ 8 }$
$ $ Organize the similar terms $ $
$\left ( \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right ) \color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ x } ^ { \color{#FF6800}{ 2 } } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ x } \color{#FF6800}{ + } \left ( \color{#FF6800}{ - } \color{#FF6800}{ 1 } \color{#FF6800}{ + } \color{#FF6800}{ 8 } \right )$
$\left ( \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right ) \color{#FF6800}{ x } ^ { \color{#FF6800}{ 3 } } - 3 x ^ { 2 } + 3 x + \left ( - 1 + 8 \right )$
$ $ Organize the mononomial expression $ $
$\color{#FF6800}{ 0 } - 3 x ^ { 2 } + 3 x + \left ( - 1 + 8 \right )$
$0 - 3 x ^ { 2 } + 3 x + \left ( \color{#FF6800}{ - } \color{#FF6800}{ 1 } \color{#FF6800}{ + } \color{#FF6800}{ 8 } \right )$
$ $ Arrange the constant term $ $
$0 - 3 x ^ { 2 } + 3 x + \color{#FF6800}{ 7 }$
$\color{#FF6800}{ 0 } - 3 x ^ { 2 } + 3 x + 7$
$ $ 0 does not change when you add or subtract $ $
$- 3 x ^ { 2 } + 3 x + 7$