SIMPLIFY THESE PLEASE

hope it helps
#carry on learning
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#1
[tex]\\ \rm\rightarrowtail 3(a)(2)(b)=6ab[/tex]
#2
[tex]\\ \rm\rightarrowtail c^5(c)=c^{5+1}=c^6[/tex]
#3
[tex]\\ \rm\rightarrowtail 2y^4(5y^3)=10y^7[/tex]
#4
[tex]\\ \rm\rightarrowtail 3gh^2(4g^3h^3)=12g^4h^5[/tex]