tolong dibantu ya besok mau dikumpul

a. 3a
b.
[tex]4 {x}^{2} {y}^{3} z[/tex]
c.
[tex]2x + 3[/tex]
d.
[tex] \frac{1}{4} [/tex]
e.
[tex] \frac{ x + 2y}{3x + 4} [/tex]

a. 18a²/6a =3a
b. 48x5y⁴z/12x³y= 4x²5y³z
c. 4x²+6x/2x = 2x(2x+3)/2x
=2x+3
d.2x/4x+2 = 2(x)/2(2x+1) = x/x+1
e.3x+6y/9x+12 = 3(x+2y)/3(3x+4)
X+2y/3x+4
f. a²+ab/4a+4b =a(a+b)/4(a+b)
a/4