Add some way of separating each chunk of equations visually

[Houston Hare]

For example:

/roll 4d6+3+2d4
#Current output:
4 + 2 + 3 + 1 + 3 + 1 + 3 = 17

#Possible suggested output:
(4 + 2 + 3 + 1) + 3 + (1 + 3) = 17

[Houston Hare]

Closed by d734a39 and b0d9d59.