Question 158877
t+r/tr^2 + 5t+r/t^2r
6t+(r*t^2r+r*tr^2)/(tr^2)(t^2r)
6t+(r^2t^2+r^3t)/(t^3r^3)
6t+[r^2t(t+r)]/(t^3r^3)
6t+(t+r)/(t^2r) answer.