JEE: The sum of the coeff of x^3 and x^-13 in the expansion (1-x^2)(1+x)(1+ 3/x + 3/x^2 + 1/x^3)^5

[@Imgamer-io6uh]

Thank you sir 🙏

[@JatheenVarmaBuddharaju]

You are welcome
All the best beta.