b
[(³√2
{(a+b)[(a² + 1)(b² + 1) + (a² - 1)(b² -1)]-2a-2b}: (√2ab)²;
d{-4ac² + [32a¹b³c²-48-(ab)]: (2ab)} (-a) (-3b)³ +4(-√7ab)*;
(13)
) ( ^
2
. C
16
5