1. The problem is to evaluate the expression $\in - 3$. 2. Here, $\in$ is not a standard mathematical symbol or number. It might be a typo or a symbol from another context. 3. If you meant the imaginary unit $i$, then the expression would be $i - 3$. 4. The expression $i - 3$ is a complex number with real part $-3$ and imaginary part $1$. 5. If $\in$ is something else, please clarify the symbol or provide more context. Final answer assuming $\in = i$: $$i - 3$$