User:Pimgeek/sandbox

$$ \mathrm{\frac{d}{{dv}_{{w}_{I}}}}{p}{\mathrm{(}}{w}_{O}{\mathrm{|}}{w}_{I}{\mathrm{)}}\mathrm=\mathrm{\frac{d}{{dv}_{{w}_{I}}}}{\mathrm{[}}\mathrm{\frac{\exp{(}{v}{'}_{{w}_{O}}{}^{T}\cdot{v}_{{w}_{I}}{)}}{\underset{\overset{W}{\sum}}{\exp{(}{v}{'}_{w}{}^{T}\cdot{v}_{{w}_{I}}{)}}}}{\mathrm{]}} $$