perfect "BUT"

I heard about this app from my friends and they gave me a bad idea about this app JUST because of these problems.

It a very helpful App BUT there is a problem Ive faced which is if I write a matrix and want to edit delete something in the middle for example I put 2 commas by mistake and wanted to delete it , I Have to delete everything and start all over again..

Also, I dont think that there is "Cramer rule" in this App. And it dose not show the steps for every thing.

I highly recommend you to solve this problem..
Thank you,

7mdi about Wolfram Linear Algebra Course Assistant