And from that, we want to subtract when this is evaluated at zero. If the exponent here is zero, if t is zero, the whole exponent is zero. So e to the zero power is just equal to one. And now we can get our calculator out to evaluate this. So get my TI-85 out, and I get, I'm just going to evaluate this inner expression right over here. So e to the negative 1.73, and from that, I want to subtract one. So that gives me negative 0.822.