$$\begin{array}{cc}\hfill \mathrm{\text{qfr}}\hfill & \hfill 𝔮\hfill \\ \hfill \mathrm{\text{Qfr}}\hfill & \hfill 𝔔\hfill \\ \hfill \mathrm{\text{qint}}\hfill & \hfill ⨌\hfill \\ \hfill \mathrm{\text{qopf}}\hfill & \hfill 𝕢\hfill \\ \hfill \mathrm{\text{Qopf}}\hfill & \hfill \mathbb{Q}\hfill \\ \hfill \mathrm{\text{qprime}}\hfill & \hfill ⁗\hfill \\ \hfill \mathrm{\text{qscr}}\hfill & \hfill 𝓆\hfill \\ \hfill \mathrm{\text{Qscr}}\hfill & \hfill 𝒬\hfill \\ \hfill \mathrm{\text{quaternions}}\hfill & \hfill ℍ\hfill \\ \hfill \mathrm{\text{quatint}}\hfill & \hfill ⨖\hfill \\ \hfill \mathrm{\text{quest}}\hfill & \hfill ?\hfill \\ \hfill \mathrm{\text{questeq}}\hfill & \hfill \stackrel{?}{=}\hfill \\ \hfill \mathrm{\text{quot}}\hfill & \hfill "\hfill \end{array}$$