-5^2+[(-3^2+2^2)+(4^2-4)] ?

Dear Student,

We have : - 52 + [ ( - 32 + 22 ) + ( 42 - 4 ) ] , So

$⇒$ - 52 + [ ( - 9 + 4 ) + ( 16 - 4 ) ]

$⇒$ - 52 + [ - 5 + 12 ]

$⇒$ - 52 + 7

$⇒$ - 25 + 7

$⇒$ 18                                                ( Ans )