-3t/t^3-t^2

To simplify the given expression (-3t/t^3 - t^2), we can begin by factoring out -t from both terms in the numerator:

-3t/t^3 - t^2 = -t(3/t^3) - t^2.

Next, we can simplify further by expanding the first term (-t) and then dividing the constant (-3) by the variable term (t^3):

- t(3/t^3) = -3t/t^3.

Now, we can rewrite the expression as:

-3t/t^3 - t^2 = -3t/t^3 - t^2.

Since the denominator of the first term (-3t/t^3) is t^3 and the denominator of the second term is t^2, we are unable to directly combine these terms. Thus, the expression (-3t/t^3 - t^2) is already in its simplest form.