Now that drags can have filters (see MDL-78662), it's easy to add multiple lines to a draggable. For example:

$$ 2x + y = 5 $$ $$ -3x + 6y = 0 $$

If you add this to a draggable item you end up with wrong alignment and with some text being outside of the draggable.

ddwtos:

ddimageortext:

I don't know MathJax so it's possible that my expression is wrong and there's a better way to create an equations system. But I guess there'll be some use cases where you have multiple lines, e.g. some text followed by an equation (not inline).