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Formula
Calculate the value
$\left( \sqrt{ 5 } + \sqrt{ 2 } \right) ^{ 2 } - \left( \sqrt{ 5 } - \sqrt{ 2 } \right) ^{ 2 }$
$4 \sqrt{ 10 }$
Calculate the value
$\left ( \sqrt{ \color{#FF6800}{ 5 } } \color{#FF6800}{ + } \sqrt{ \color{#FF6800}{ 2 } } \right ) ^ { \color{#FF6800}{ 2 } } - \left ( \sqrt{ 5 } - \sqrt{ 2 } \right ) ^ { 2 }$
 Calculate power 
$\color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } } + \color{#FF6800}{ 7 } - \left ( \sqrt{ 5 } - \sqrt{ 2 } \right ) ^ { 2 }$
$2 \sqrt{ 10 } + 7 - \left ( \sqrt{ \color{#FF6800}{ 5 } } \color{#FF6800}{ - } \sqrt{ \color{#FF6800}{ 2 } } \right ) ^ { \color{#FF6800}{ 2 } }$
 Calculate power 
$2 \sqrt{ 10 } + 7 - \left ( \color{#FF6800}{ 7 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } } \right )$
$2 \sqrt{ 10 } + 7 \color{#FF6800}{ - } \left ( \color{#FF6800}{ 7 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } } \right )$
 Change the symbol of each term in parentheses when there is a (-) symbol in front of parentheses 
$2 \sqrt{ 10 } + 7 \color{#FF6800}{ - } \color{#FF6800}{ 7 } + \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } }$
$2 \sqrt{ 10 } \color{#FF6800}{ + } \color{#FF6800}{ 7 } \color{#FF6800}{ - } \color{#FF6800}{ 7 } + 2 \sqrt{ 10 }$
 Remove the two numbers if the values are the same and the signs are different 
$2 \sqrt{ 10 } + 2 \sqrt{ 10 }$
$\color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 10 } }$
 Calculate between similar terms 
$\color{#FF6800}{ 4 } \sqrt{ \color{#FF6800}{ 10 } }$
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