Verify 3.3.6. That if S,T∈L(V,W)S,T \in \mathcal L(V,W)S,T∈L(V,W) then M(S+T)=M(S)+M(T)\mathcal M(S+T) = \mathcal M(S) + \mathcal M(T)M(S+T)=M(S)+M(T).
TODO