calculus

do you mean: d/ dt (36r)/(t+0.6)^2 ?

[input]diff( (36r)/(t+0.6)^2, t )[/input]

do you mean: d/ dr (36r)/(t+0.6)^2 ?
[input]diff( (36r)/(t+0.6)^2, r )[/input]