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PLEASE HELP! Does anyone possible know how to do these two problems! I'm freaking out!

∫(secx^2)(e^cotx)dx

Thank you so much!

PLEASE HELP! Does anyone possible know how to do these two problems! I'm freaking out!

∫(secx^2)(e^cotx)dx

And

∫9x^3/Square root of (1+x^2) dx NEED TO USE SUBSTITUTION X=Tanx

Thank you so much!

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# Solving ∫(secx^2)(e^cotx)dx

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