−15+4/5(15e−10)−10e.

To simplify this expression, you'll need to follow the order of operations (PEMDAS/BODMAS).

First, we'll evaluate the exponential term: 15e^-10.

Using a calculator, we find that 15e^-10 ≈ 1.527.

Next, we'll perform the multiplication: 4/5 * 1.527 = 1.2216.

Finally, we simplify the whole expression:

-15 + 1.2216 - 10e.

And that's the simplified expression.