This grapher is created by QuarkGame in 2018. The grapher has less functionality than Desmos or Grapher on Mac. "However, it is completed with minimalist design and simple algorithms."
You can now access the list of shortcuts by moving your cursor over the Q-shape logo.
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Screenshot is saved with name "screenshot.jpg" on Desktop
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Power of numbers, usually shown as '^', is automatically converted to '**'. Holding Tab bar to find out the converted raw python expression
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You can use all the functions in python math module, such as 'tan()'
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instead of using 'a**b', try to use 'sqrt()' if b = 1/2, or pow(a, b) to avoid false calculation