My problem is slightly more complicated than the one I am giving in the 
example,but in essence the problem is, given a 2x2 array of gerunds, and 
anumber, how can I return a 2x2 array of the gerunds evaluated for the number.
e.g.

arr =: *:`%:



   arr2 =: +:`^


mat =. arr ,. arr2


list =. 4 3


I can evaluate individual cells thusly




((0{0{mat)`: 6) 4


But would like a single expression that would yield the result, for example 
(input = 4):


16 2 
8  54.5982


I cannot seem to get an expression that works. To add slightly to the 
complexity, my actual problem involves an
arbitrary nxn matrix.

                                          
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