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\int \frac{(\cos x - x \sin x + 3 x^{2})}{s \cos x + x^{3}} d x = ক ত ?

\frac{\sin x + x \cos x}{x \sin x + 3 x} + c

\log (x^{3} + x \cos x) + c

\log (\frac{\sin x + x \cos x}{x^{2} + x \sin x}) + c

\log (\frac{\sin x + x \cos x}{x^{2} + x \sin x})

কোনোটিই নয়

ANS : 2

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