will you fix sine and cosine expressions?

[CaptainChicky]

title @enjeck

#23

I know you changed your code and refactored, but implementing the limits and parenthesis yourself shouldn't be too bad and is aesthetically pleasing so i beg xd

[CaptainChicky]

see my PR #26 which shouldve fixed this

[CaptainChicky]

fixed via manual integration in latest ocmmit see #26