`int(x^2)/(x(x^2-1))dx` is equal to

int(x^(2)+1)/(x(x^(2)-1))dx is equal to

int(x^(2)+1)/(x(x^(2)-1))dx is equal to

int(dx)/(x(x^(2)+1)) is equal to

int((x+1)^(2))/(x(x^(2)+1))dx is equal to:

int((x+1)^(2))/(x(x^(2)+1))dx is equal to a) "log"|x(x^(2)+1)|+C b) "log"|x|+C c) "log"|x|+2"tan"^(-1)x+C d) "log"(1/(1+x^(2)))+C

int_(1)^(2)(dx)/(x^(2)) is equal to