Question 986557
Learn to use parentheses, they make expression much more readable.
{{{r^2t^(1/2)r^(2/3)t^(-3/2)=r^(2+2/3)t^(1/2-3/2)}}}
{{{r^2t^(1/2)r^(2/3)t^(-3/2)=r^(6/3+2/3)t^(-2/2)}}}
{{{r^2t^(1/2)r^(2/3)t^(-3/2)=r^(8/3)t^(-1)}}}
{{{r^2t^(1/2)r^(2/3)t^(-3/2)=r^(8/3)/t}}}