Fix Issue 12

[RubyTheRoobster]

This pull request fixes Issue #12 by adding nested functions.

[RubyTheRoobster]

My original idea worked better, I'm going to use that.

[RubyTheRoobster]

For some reason, the function is duplicating parentheses blocks. Per the output:

x1*(x2*x3(x2*x3)

Is the function being sent to verification, which in addition to being wrong (syntactically), is not equivalent to the original function at all, which was

x1*(x2*x3)

All previous functions seem to be passed correctly. As a matter of fact, it only seems to be a problem when the parentheses come last. Finally, it doesn't build on Ubuntu for whatever reason, yet it builds perfectly fine on my Windows machine.

[RubyTheRoobster]

Fixed the above by removing the oldi variable.

[RubyTheRoobster]

A new bug has arisen: the substitution never happens in the first place.

Edit: I'm an idiot, I was calling it incorrectly anyways.

Edit 2: Fixed the above, now it crashes.

[RubyTheRoobster]

Even with all that fixed, the substitution part still never happens.

Edit: It misses a parenthesis when copying the function, it fails BEFORE the substitution.

[RubyTheRoobster]

I'm going with the original idea I had, by denoting functions after operators with spaces preceding them. This had to be done, as otherwise it would interpret +f(x2)(Number) as if +f was the function being called. Now, to achieve addition it should be written

g(x1)(Number)+ f(x2)(Number)

Let's see how this goes.

[RubyTheRoobster]

With my current changes, now it is messing up the g(x1)(Number) part, and not the addition. Probably a bug when I substitute it into the main body.

[RubyTheRoobster]

Nevermind. For whatever reason, it includes the value of g(x1)(Number) in tempstr2. I am still struggling to find where the bug is.

[RubyTheRoobster]

For the record: It still doesn't work. I STILL CAN'T FIX THAT SINGLE LINE TO WORK FOR ALL TEST CASES ARGHHHHHHHHHHHHHHHHHH

[RubyTheRoobster]

This is being delayed until the next release.