Mathlean · Online math workspace
Set difference calculator
Remove the elements of one finite set from another.
How to use this calculator
Edit the sets around the set-minus symbol. The starter leaves 1 and 3.
Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.
Try it here
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
Set difference is directional: reversing the sets generally changes the answer.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.