Miscellaneous symbols. \frac{}{} \sqrt[]{} \flat \natural \sharp \prime \backslash \forall \infty \exists \emptyset \Box \nabla \neg \Diamond \surd \triangle \| \clubsuit \aleph \wp \top \diamondsuit \Re \ell \bot \heartsuit \Im \imath \partial \spadesuit \hbar \jmath \angle \mho