Posted by **Erika** on Sunday, December 5, 2010 at 11:46pm.

Find the integral by substitution

∫ [(16 x3)/(x4 + 5)] dx

∫[ 4 x/(√{x2 + 3})] dx

∫ 8 x2 e4 x3 +7 dx

PLEASE help with all three. i'd really appreciate it

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