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Problem Solution
% Correct
d/dx [ sin(x) ] cos(x)

89.8% d/dx [ -cos(x) ] sin(x)

89.4% d/dx [ 3x ] 3

88.4% d/dx [ 7x + 1 ] 7

88% d/dx [ 9x + 4 ] 9

88% d/dx [ e^{x } ] at x = 1 e

80.8% d/dx [ x^{5} ] at x = 1 5

80.3% d^{2} /dx^{2} [ 2x ] 0

78% d^{2} /dx^{2} [ 2x^{2} ] 4

75.3% d^{3} /dx^{3} [ 1 ] 0

75%

Problem Solution
% Correct
d^{2} /dx^{2} [ x^{3} ] 6x

73.9% d/dx [ e^{2x } ] at x = 0 2

72% d^{3} /dx^{3} [ x^{4} ] 24x

66.7% d/dx [ 5x^{2} + 4 ] 10x

62.8% d/dx [ 7x^{2} + 72 ] 14x

60.7% d^{3} /dx^{3} [ 2x^{3} + 7x ] 12

59.5% √ ( d/dx [ tan(x) ] ) sec(x)

51.6% d/dx [ 3x^{3} ] at x = 2 36

49.7% d/dx [ x^{4} ] at x = 2 32

44.2% d/dx [ ln|x| ] 1|x

38.2%

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