--> write javascript script (OK, users trusted ? ==> safe mode possible if public website)
Imaginary example: (using math.js)
<params> (avant l'exo)
- const x = math.random()
- const y = math.random()
+ const x = math.random();
+ const y = math.random();
</params>
<result>
let M = math.matrix([[7, x], [y, -3]]);