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Formula
Calculate the value
$\left( \sqrt{ 3 } -1 \right) ^{ 2 } +2 \left( \sqrt{ 3 } -1 \right) -1$
$1$
Calculate the value
$\left ( \sqrt{ \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right ) ^ { \color{#FF6800}{ 2 } } + 2 \left ( \sqrt{ 3 } - 1 \right ) - 1$
 Calculate power 
$\color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 3 } } + 2 \left ( \sqrt{ 3 } - 1 \right ) - 1$
$4 - 2 \sqrt{ 3 } + \color{#FF6800}{ 2 } \left ( \sqrt{ \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right ) - 1$
 Multiply each term in parentheses by $2$
$4 - 2 \sqrt{ 3 } + \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 3 } } \color{#FF6800}{ - } \color{#FF6800}{ 2 } - 1$
$4 \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 3 } } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 3 } } - \color{#FF6800}{ 2 } - 1$
 Eliminate opponent number 
$4 - 2 - 1$
$\color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ - } \color{#FF6800}{ 1 }$
 Calculate the sum or the difference 
$\color{#FF6800}{ 1 }$
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