Zorro explained it very well. This combination of math symbols just has no meaning at all. Your question is similar to ask for "... how can I evaluate 5+*/7= ?..."
MM I'm taking DiffEq and Leibniz Notation is giving me a headache this somewhat resembles it
∫(1/dx) has no meaning but ∫dt does because dt = c/dx If they're supposed to be equivalent (i.e LHS == RHS) how one doesn't make sense but the other does, I thought dx was pure notational