a$.$ If $F(x)={\displaystyle \underset{3}{\overset{x}{}}}\frac{1}{t}dt,$ then $F^{\text{'}}(x)=q,$

b$.$ If $F(x)={\displaystyle \underset{x}{\overset{7}{}}}\frac{1}{t}dt,$ then $F^{\text{'}}(x)=q,$

c$.$ If $F(x)={\displaystyle \underset{18}{\overset{x^3}{}}}\frac{1}{t}dt,$ then $F^{\text{'}}(x)=q,$

d$.$ If $F(x)={\displaystyle \underset{2+cosx}{\overset{x^2+1}{}}}\frac{1}{t}dt,$ then $F^{\text{'}}(x)=q,$

Note: You can earn partial credit on this problem.