Q: Matrix math syntax in wolfram alpha I'm having trouble getting Wolfram Alpha to do my bidding with regard to matrix manipulations.  I am trying to take the derivative of the following matrix expression with respect to m, and was hoping WolframAlpha could be used:
-(x-m)^T * E^-1 * (x-m)
...However, I cannot discover how to input matrices as variables, and do not know what to use for the transpose operator.  (^T was used in this case.  x and m are vectors, E is a symmetric matrix.)

Give a man a fish: How can this derivative be solved?
Teach a man to fish: How can I input such expressions into Wolfram Alpha?
If it helps, I know the solution should look something like (but may be off by some scalar constant): 
E^-1(x-m)

A: You probably want:

$-$Transpose[x-m].Inverse[E].(x-m)

Although WolframAlpha might automatically think E is the number 2.71828....
