a
\(\mathrm{W}=\int_{\mathrm{x}_1}^{\mathrm{x}_2} \mathrm{Fdx}\)

\(\mathrm{W}=\int_2^4\left(3 \mathrm{x}^2+2 \mathrm{x}-5\right) \mathrm{dx}\)

\(\mathrm{W}=\left[\mathrm{x}^3+\mathrm{x}^2-5 \mathrm{x}\right]_2^4\)

\(\mathrm{~W}=[60-2] \mathrm{J}=58 \mathrm{~J}\)