1.sorum: ∫cosx dx / (sin²x-sinx-2) = ?
2.sorum: ∫x³+x²+x+3 dx /(x⁴+3x²+2) =?
1.sorum: ∫cosx dx / (sin²x-sinx-2) = ?
2.sorum: ∫x³+x²+x+3 dx /(x⁴+3x²+2) =?
2)
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