Calculator

Arokettu\ArithmeticParser\Calculator class is used to interpret the arithmetic expression.

Arokettu\ArithmeticParser\LazyCalculator class also supports lazy expressions, see Lazy Calculations.

Calculator::parse() / LazyCalculator::parse()

Parses the expression and creates an instance of calculator for it.

calc()

Evaluates the expression with given variables (if any).

Calculator::evaluate() / LazyCalculator::evaluate()

Calculator::evaluate($expression, $config, ...$vars) is a shorthand for Calculator::parse($expression, $config)->calc(...$vars)