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Formula
Find the difference
$$\dfrac { 1 } { 2 } - \dfrac { 1 } { 2 }$$
$0$
$\color{#FF6800}{ \dfrac { 1 } { 2 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 1 } { 2 } }$
 Remove the two numbers if the values are the same and the signs are different 
$0$