Question

ANY GIRL WHO IS 15 YEARS OLD AKA IN 10 STD
( NEGLACT THE ABOVE STATEMENT)
♡-♡

PLZ ANSWER ALL ANSWERS IN THE ATTACHMENT TO GET THE BRAINIST OR ATLEAST 37 TH Q TO GET THE BRAINIST ​

Answer 1

$\frac{ {a}^{ - 4} - {b}^{ - 4} }{ {a}^{ - 2} - {b}^{ - 2} } \\ \\ \frac{ \frac{1}{ {a}^{4} } - \frac{1}{ {b}^{4} } }{ \frac{1}{ {a}^{2} } - \frac{1}{ {b}^{2} } } \\ \\ \frac{ \frac{ {b}^{4} - { a}^{4} }{ {a}^{4} {b}^{4} } }{ \frac{ {b}^{2} - {a}^{2} }{ {a}^{2} {b}^{2} } } \\ \\ \frac{ {b}^{4} - {a}^{4} }{ {a}^{2} {b}^{2} } \times \frac{1}{ {b }^{2} - {a}^{2} } \\ \frac{( {b}^{2} + {a}^{2} )( {b}^{2} - {a}^{2} )}{ {a}^{2} {b}^{2} } \times \frac{1}{ {b}^{2} - {a}^{2} } \\ \frac{ {b}^{2} + {a}^{2} }{ {a}^{2} {b}^{2} }$