Equation showing error "Missing { inserted" or "Missing } inserted" despite having properly closed every curly braces

Question

\begin{align*}
    I(T) = I_m exp(\frac{E}{k T_m}) exp(- \frac{E}{k(T_m)^2}) \int_{T_m}^{T} exp(\frac{E}{k T_m} - \frac{E dT^'}{k T^'})    
\end{align*}

This line of code is giving me trouble as I get the missing { error no matter how much I try to correct it. This line of code works fine in Overleaf from which my friend sent me but not working with my installed LaTeX library along with VS Code. Any fixes?

Answer 1

The error is due to the incorrect input T^' which should be T' but also \exp and do not use align for single line displays, so

\documentclass{article}

\usepackage{amsmath}

\begin{document}
\[
    I(T) = I_m \exp(\frac{E}{k T_m}) \exp(- \frac{E}{k(T_m)^2}) \int_{T_m}^{T} \exp(\frac{E}{k T_m} - \frac{E dT'}{k T'})  
\]
\end{document}