Find second order derivative of `x^3+tanx`

Explanation

`y=x^{3}+\tan x`



`\frac{d y}{d x}=3 x^{2}+\sec ^{2} x`



`\frac{d^{2} y}{d x^{2}}=6 x+2 \sec x \cdot \sec x \tan x`


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