Compute: ` [7!]/[4!2!]`

Compute: [52!]/[48!4!]

Compute (8!)/(6!xx2!)

Compute: (20 !)/(18 !)

Compute: (3!)(5!)

Compute (i) (7!)/(5!) (ii) (12 !)/((10 !)(2!))

Compute: (10 !)/(6! 10 !)

Compute (98)^5 .

Compute: 5/(12)-7/(12)+(11)/(12)

Compute: 1/(5!)+1/(6!)+1/(7!)

Consider a binary operation * on the set {1, 2, 3, 4, 5} given by the following multiplication table Compute (2*3) *4 and 2* (3*4) Is * commutative? (iii) Compute (2*3)*(4*5)