+ means: More than, Add, In Addition, Increased, In Excess, Greater.
- means: Decreased by, Less than, Subtract, Difference, Diminished,
........Reduced, Remainder.
• or x means: Times as much, Percent of, Multiply, Product, Interest on.
/ or ÷ means: Divide, Quotient, Per.
(...) means: Quantity.
= means: Is, Was, Equal, Will be, Results.
