( - 97 ) . ( - 1 - 595 ) - 595 . 97
= ( - 97 ) . ( - 1 ) - ( - 97 ) . 595 - 595 . 97
= 97 . 1 - 97 . ( - 595 ) - 595 . 97
= 97 . [ 1 - ( - 595 ) - 595 ]
= 97 . ( 1 + 595 - 595 )
= 97 . 1
= 97
( -97 ) . ( -1 - 595 ) - 595 . 97
= -97 + 97 . 595 - 595 .97
= ( -97 ) + [ 97.595 - 595 . 97 ]
= ( -97 ) + 0
= -97