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Formula
Expand the expression
$4a- \{ 4b+ \left( 3a-2b \right) \}$
$a - 2 b$
Organize polynomials
$4 a - \left ( \color{#FF6800}{ 4 } \color{#FF6800}{ b } \color{#FF6800}{ + } \left ( \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b } \right ) \right )$
 Get rid of unnecessary parentheses 
$4 a - \left ( \color{#FF6800}{ 4 } \color{#FF6800}{ b } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b } \right )$
$4 a - \left ( \color{#FF6800}{ 4 } \color{#FF6800}{ b } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b } \right )$
 Organize the similar terms 
$4 a - \left ( \left ( \color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \right ) \color{#FF6800}{ b } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \right )$
$4 a - \left ( \left ( \color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \right ) \color{#FF6800}{ b } + 3 a \right )$
 Arrange the constant term 
$4 a - \left ( \color{#FF6800}{ 2 } \color{#FF6800}{ b } + 3 a \right )$
$4 a - \left ( \color{#FF6800}{ 2 } \color{#FF6800}{ b } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \right )$
 Sort the polynomial expressions in descending order 
$4 a - \left ( \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ b } \right )$
$4 a \color{#FF6800}{ - } \left ( \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ b } \right )$
 Change the symbol of each term in parentheses when there is a (-) symbol in front of parentheses 
$4 a \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b }$
$\color{#FF6800}{ 4 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b }$
 Organize the similar terms 
$\left ( \color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \right ) \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ b }$
$\left ( \color{#FF6800}{ 4 } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \right ) \color{#FF6800}{ a } - 2 b$
 Organize the mononomial expression 
$\color{#FF6800}{ a } - 2 b$
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