$m=m_{0} \sqrt{1-\frac{\mathrm{v}^{2}}{\mathrm{c}^{2}}}$

$m=\frac{m_{o}}{1-\frac{v^{2}}{c^{2}}}$

$\mathrm{m}=\frac{\mathrm{m}_{0}}{\sqrt{1+\frac{\mathrm{d}^{2}}{\mathrm{c}^{2}}}}$