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RedCrab is a simple yet multifunctional and powerful calculator for Windows that also provides an interface for entering and editing expressions, equations and formulae. Basically it is an amalgamation of a powerful scientific calculator with support for statistical, geometrical and financial functions plus it has an Excel like interface where you can actually setup variables and solve equations. It is very similar to writing by hand on a piece of paper except you also have the calculating power of the computer. This way you can produce graphs, expressions, formulae etc with solutions and print them for reference or export images to your projects etc.
