If f(s)=2s3st2t2+3dt\displaystyle {f{{\left({s}\right)}}}={\int_{{{2}{s}}}^{{{3}{s}}}}\frac{{{t}^{{2}}}}{{{t}^{{2}}+{3}}}{\left.{d}{t}\right.} then
f(s)\displaystyle {f}'{\left({s}\right)} =