R
re_night


[TEX]\int {\sqrt {x^3 + 1} dx} [/TEX]
[TEX]\int {x^3 .\sqrt {x^3 + 1} dx}[/TEX]
Thanks trước................
[TEX]\int {x^3 .\sqrt {x^3 + 1} dx}[/TEX]
Thanks trước................
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