matrix multiplication

Hello,

is there a way to do the following multiplication in one line?

U . m . U^T

if I try it this way:
U*=(m*=U.T())

then it gets screwed up because U.T() transposes U and then I basically have U^T . m . U^T. However if I try to transpose U again during this task like this:
(U.T())*=(m*=U.T())
then I still get the same result as above (which is wrong).

Is there a way to concatenate such multiplications into one line or some way to force the m*=U.T() to not change U in the process?

Mario

PS! U,m are 2x2 matrices