AK-Calculator

From Advanced Knack:

A free and simple calculator makes your equation easy to read, easy to write and easy to modify and it also analyse the result. Instead of entering your equation one by one you easily enter it once. AK-Calculator will make some changes to your equation to show you how the computer will read it. Just by one look you will understand the Operator Precedence and Operator Associativity for your equation. You can easily modify your equation at any time. And if you opened any number of parentheses you will know how many parentheses you need to close them. And even if you forget to close the parentheses, you will get the result. The cool thing about the result is that you will get it in details, so you can know the result of each part of your equation separately without doing any more effort.

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