Input: 2d4+10
Code: s/d/q(+~~rand($')+d)x$`/e;

2d4+10
2(q(+~~rand($')+d)x$`)4+10
2(q(+int(rand($'))+d)x$`)4+10
2(q(+int(rand(4+10))+d)x2)4+10
2('+int(rand(4+10))+d'x2)4+10
2('+int(rand(4+10))+d''+int(rand(4+10))+d')4+10
=?????