(for some reason I can't work the latex)
f(x) = -3/( -4 +3)
f'(x) = ( -12 )/ ( -4 +3)^2
f''(x) = ...... basically, in the numerator I got
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There is a latex error ...
For calculating the second derivative it can be useful to factorize the denominator so you simplify the fraction.
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