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Formula
Expand the expression
$\left( 4a-2 \right) + \left( 2a-5 \right)$
$6 a - 7$
Organize polynomials
$\left ( \color{#FF6800}{ 4 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \right ) \color{#FF6800}{ + } \left ( \color{#FF6800}{ 2 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 5 } \right )$
 Get rid of unnecessary parentheses 
$\color{#FF6800}{ 4 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 5 }$
$\color{#FF6800}{ 4 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 5 }$
 Organize the similar terms 
$\left ( \color{#FF6800}{ 4 } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \right ) \color{#FF6800}{ a } \color{#FF6800}{ + } \left ( \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ - } \color{#FF6800}{ 5 } \right )$
$\left ( \color{#FF6800}{ 4 } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \right ) \color{#FF6800}{ a } + \left ( - 2 - 5 \right )$
 Arrange the constant term 
$\color{#FF6800}{ 6 } \color{#FF6800}{ a } + \left ( - 2 - 5 \right )$
$6 a + \left ( \color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ - } \color{#FF6800}{ 5 } \right )$
 Arrange the constant term 
$6 a \color{#FF6800}{ - } \color{#FF6800}{ 7 }$
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