Calc2.21

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Find the derivative of f(x)\, with respect to x\,: f(x)=\tan ^{2}x+8(x^{2}+4x+3)^{9}+\sec ^{3}x\,

f'(x)=2(\tan x)(\sec ^{2}x)+72(x^{2}+4x+3)^{8}(2x+4)+3(\sec ^{2}x)(\sec x\tan x)\,


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