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  6. Calculus Help: Differential Equations - dy/dx-tany/(1+x)=(1+x) e^x secy - Techniques

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  7. Calculus Help: Complementary Solutions - Differential Equations: y''+4y'+13y=0, y''-6y'+13y=0

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  10. Linear Ordinary Differential Equations: (y+1)dx+(4x-y)dy=0 - Techniques to solve

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  11. Calculus Help: Homogeneous - Differential Equations - ( x-y lny+y lnx) dx+x( lny-lnx )dy=0

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  13. Differential Equations: Linear ODE - Integrating Factor - dy/dx- y=11/8 e^(-x/3)

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  14. Calculus Help: Linear Differential Equations - Integrating Factor - (x^2+1) dy/dx+3xy=6x

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  15. Calculus Help: Separable Differential Equations: (1-x) y^'=y^2 - Basic Integration - High School

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  20. 《Adventures on the Alien Planet Gok in 1985》 | Preface

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  23. Calculus Help: Exact Differential Equations: 3y^3 dx+9xy^2 dy=0 - Techniques

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