
Implied Multiplication 

If no operator is specified between 2 values, the values are multiplied.
Example: 2π is equivalent to 2 ∙ π
Between variables, a space must be set. Example: 2π f is interpreted as 2 ∙ π ∙ f
If there are no spaces between a and b, this is considered a variable named ab.
After leading digits, space is not required because names must always begin with letters. The term 123a can therefore be clearly recognized as 123 ∙ a 
Examples 

Input 
Interpretation 
a b c 
a ∙ b ∙ c 
3a 
3 ∙ a 
2X_{L} 
2 ∙ X_{L} 
R_{1}R_{2} 
R_{1 } ∙R_{2} 
2abc 
2 ∙ abc 
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