Question
Evaluate: $\int \frac{x^2 \cdot \tan ^{-1}\left(x^3\right)}{1+x^6} d x$
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$xy = ae ^{ x }+ be ^{- x }+ x ^2 ; x \frac{d^2 y}{d x^2}+2 \frac{d y}{d x}+x^2=x y+2$
$\sqrt{\cos x}+\sqrt{\cos \sqrt{x}}$
| $x_i$ | 1 | 2 | 3 | 4 |
| $p_i$ | 0.4 | 0.1 | 0.2 | 0.3 |