Nm−2C−2\mathrm{Nm}^{-2} \mathrm{C}^{-2}Nm−2C−2
N−1 m−2C−2\mathrm{N}^{-1} \mathrm{~m}^{-2} \mathrm{C}^{-2}N−1 m−2C−2
Nm−2C2\mathrm{Nm}^{-2} \mathrm{C}^{2}Nm−2C2
N−1 m−2C2\mathrm{N}^{-1} \mathrm{~m}^{-2} \mathrm{C}^{2}N−1 m−2C2
