Question 435047
1){{{2lnx+4lny=lnx^2+lny^4=lnx^2y^4}}}

2){{{3logx^2-7logy=logx^6-logy^7=log((x^6)/(y^7))}}}

3){{{log(4,x)-log(4,9)+(1/2)(log(4,100))=log(4,(x/9))+log(4,10)=log(4,10x/9)}}}