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Brendan Fields

2 titles listed

GraphCalcMathematics · $20.00 USDIn the beginning, there was GraphCalc. It was free, and things were good. Then we, the authors, started incurring many expenses. We asked for donations, but...GraphCalcMathematics · $10.00 USDIn the beginning, there was GraphCalc. It was free, and things were good. Then we, the authors, started incurring many expenses. We asked for donations, but...