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Indefinite Integrals

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Indefinite Integrals

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Solve the following indefinite integrals, using $C$ to represent an unknown constant.

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$\\int(x^4-\\var{a}x^3+\\var{b}x-\\var{c})\\mathrm{dx}$

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$\\int(u+\\var{d})(2u+\\var{f})\\mathrm{du}$

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