Bugfixes and minor enhancements#2

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Commits on May 7, 2021

Bugfix for formulas with brackets
Andreas Wahlen
committed
Allow multiple calculations with single formula (different sets of variable values)
Andreas Wahlen
committed
Easier regex and allow multi-char variable names
Andreas Wahlen
committed
Removed try-catch because errors should not be visible on website
Andreas Wahlen
committed
Made number check more robust and intuitive
Andreas Wahlen
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Added exception if variable is undefined
Andreas Wahlen
committed
Removed `round(..., 2)` and handled division by zero as NaN
Andreas Wahlen
committed
updated readme according to changes
Andreas Wahlen
committed