How to access the math panel feature in windows 7

Math Input Panel uses the math recognizer that's built into Windows 7 to recognize handwritten math expressions. You can then insert the recognized math into a word-processing or computational program.Math Input Panel is designed to be used with a tablet pen on a Tablet PC, but you can use it with any input device, such as a touchscreen, external digitizer, or even a mouse.
To open a math panel go to start>accessories>math input panel
the math input panel displays like this

you can watch the youtube video of how to use the Math input panel, click here to watch