What does $\int_{-\infty}^{\infty}\sum_{i=0}^{\infty}\frac{x^i}{i!}dx$mean? I was reading a research paper and I came across this sentence which I didn't really understand.

We first cast Eq.1 into its standard form: $$\int_{-\infty}^{\infty}\sum_{i=0}^{\infty}\frac{x^i}{i!}dx$$
$$T^2-944T+155184-h=0$$
Eq. 1 is stated at the beginning of the paper and is the following:
$$h(T)=520(212-T)+{(212+T)}^2$$
What are the integral and sums supposed to mean and/or refer to?

I don't know the context, but $$\sum_{i=0}^{\infty} \frac{x^i}{i!} = e^x$$
because the sum is the Taylor series of $e^x$.
If this is the case, the integral has a more clear meaning.
