-15+4/5(15e-10)-10e.

To simplify the expression, let's break it down step by step:

-15 + 4/5(15e^-10) - 10e

First, we can calculate 4/5(15e^-10):

4/5(15e^-10) = (4/5) * (15e^-10) = (4*15)/(5) * e^-10 = 60/5 * e^-10 = 12e^-10

Now, we can substitute this result back into the original expression:

-15 + 12e^-10 - 10e

To simplify further, let's combine the terms -15 and -10e:

-15 - 10e + 12e^-10 = -10e + 12e^-10 - 15

Finally, there is no obvious way to simplify this expression further without additional information or values for e.