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Find (i) inte^x(t a n^(-1)x+1/(1+x^2))d...

Find (i) `inte^x(t a n^(-1)x+1/(1+x^2))dx` (ii) `int((x^2+1)e^x)/((1+x)^2))dx`

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Let `I=inte^x(t a n^(-1)x+1/(1+x^2))dx`..........(1)
Put `tan^(-1)x=f(x)`
`=>f'(x)=1/(1+x^2)`
`:. eq(1)=>inte^x[f(x)+f'(x)]dx` `=e^xf(x)+c` ...
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