Answer to Question #86483 in Calculus for Megha

Question #86483

Find derivative of:
1) ln (x^2-3x+8)/sec(x^2+7x)
2) arctan(cosh (2x-3))
3) (tan x)^ (ln x +x^2)
4) (sec^2 x - tan^2 x) ^ 45

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