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I'm looking for software that can serve as a replacement for a physical "scratch pad", on a Windows system with only keyboard and touchpad interfaces. This is intended to facilitate manual calculations, but not actually do any computation.

$\LaTeX$ is good for some things, but I haven't found an easy way to do things like vertical addition/subtraction/multiplication/division with the same speed & comfort as I might do on a scratch pad.

Excel and Notepad can serve the purpose, but they're a bit clumsy at it. Paint could do, but is not so great to use without a mouse.

Is there any purpose-built "scratch pad" software out there? Or, are there other workarounds I might not have thought of which work well on a laptop with no regular mouse?

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    @IttayWeiss: [Help Center > Asking](http://math.stackexchange.com/help/on-topic) says that questions about "software that mathematicians use" are on-topic. This appears to fall in that category.2013-08-23

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Microsoft Math has math handwriting recognition capabilities.

MS Math

A few other products claim similar functionality:

MoboMath

FluidMath

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    I'm searching for the same sort of thing - MS Math doesn't work, because it stubbornly refuses to simply let me write down what I need... It solves everything, which I don't want out of a scratch pad. Has anyone found any software that allows you to write mathematical equations nicely, in order to solve them manually?2013-08-23
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You might try Math-o-mir. I haven't used it myself but the site says:

The idea behind Math-o-mir was: "why can't I use my PC as simple as I am using pencil when writing mathematical equations?"