Hi, I have some questions about abilities and limitations of Wolfram Alpha concerning mathematics: 1) Can I use programming structures (loops, assigning commands)? (If yes then how - can you please give some basic example of assigning a value to variable and using it and can you also give an example of using loop statement?) 2) Is there some list saying what from Mathematica language is and what is not implemented in Wolfram Alpha? 3) (Concrete example) Having list consisting of lists (eg {{1,2},{3,4,5}}) how can I write a function to get a list containig sums of elements of the containing lists? So for my example the result will be {3,12} (because we have two lists containing in our list - {1,2} and {3,4,5} - and sum of elements in first, resp. second list is 3, resp. 12).