Changing normal execution order

[timber-they]

In an operation chain I want it to be possible to change the normal order from the left to the right with braces like that:

(1+2)*(3-4)/(5%(6.7))

This is actually harder than I thought and I'm not sure wether I'll be able to do this with the current compiler structure - and I'm not motivated to change the structure...

[timber-they]

Actually I mainly did that - but I still got to implement standard bracketing - that means:
3+33 should be 3+(33)