tolong dibantu ya tolong dijawab beserta caranya

a) 28/-7.a^(5-4).b^3
= -4.a^1.b^3
= -4ab^3
b) 42/6.x^(7-3).y^(8-2).z
7.x^4.y^6.z
= 7x^4y^6z
c) -32/8.p^(7-1).q^(8-6).r^(4-1)
= -4p^6q^2r^3
d) -72/-12.x^(8-2).y^(9-3).z^(7-1)
6x^6y^6z^6 = 6(xyz)^6
e) y^3 (3+ 4y) : 6y^5
= y^(3-5)(3+4y)/6
= y^-2 (3+4y)/6
= (3y^-2+4y^-1)/6