Evaluate the integral by making the given substitution. (Use C for the constant of integration.) [cost/Ft) dt, u = J} ft Evaluate the integral by making the given substitution. (Use C for the constant of integration.) fa/zde, u=z8 Evaluate the integral by making the given substitution. (Use C for the constant of integration.) 1 1 [21/5+dx, u=5+i x X x