Formula

Calculate the value

Answer

$a ^{ 2 } - \dfrac{ 1 }{ a ^{ 2 } }$

$\dfrac { a ^ { 4 } - 1 } { a ^ { 2 } }$

Arrange the rational expression

$\color{#FF6800}{ a } ^ { \color{#FF6800}{ 2 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 1 } { a ^ { 2 } } }$

$ $ Calculate the expression as a fraction format $ $

$\color{#FF6800}{ \dfrac { a ^ { 4 } - 1 } { a ^ { 2 } } }$

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