Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPTerm.m

@@ -9,9 +9,10 @@
 #import "MPTerm.h"
 
 #import "MPParsedExpression.h"
-#import "MPSumTerm.h"
 #import "MPEvaluationContext.h"
 
+
+
 @implementation MPTerm
 
 - (NSDecimalNumber *)evaluate:(NSError *__autoreleasing *)error
@@ -22,6 +23,7 @@
     return result;
 }
 
+
 - (BOOL)defineVariable:(NSString *)variableName
                  value:(NSDecimalNumber *)value
                  error:(NSError *__autoreleasing *)error
@@ -39,6 +41,7 @@
     return couldDefineVariable;
 }
 
+
 - (NSDecimalNumber *)valueForVariable:(NSString *)variableName
                                 error:(NSError *__autoreleasing *)error
 {
@@ -54,6 +57,7 @@
     return value;
 }
 
+
 - (void)undefineVariable:(NSString *)variableName
 {
     [[MPEvaluationContext sharedContext] undefineVariable:variableName];