log[2](x^(2/3)-1)=log[3](x)
log[3](x^(2/3)-1)={log[3](2)}*{log[3](x)}
log[3](x^(2/3)-1)=log[3](x+2)
x^(2/3)-1=3^{log[3](x+2)}
x^(2/3)-1=x+2