sp3\mathrm{sp}^{3}sp3
sp3d\mathrm{sp}^{3} \mathrm{d}sp3d
sp3d2\mathrm{sp}^{3} \mathrm{d}^{2}sp3d2
sp3d3\mathrm{sp}^{3} \mathrm{d}^{3}sp3d3