Hi so the problem is to evaluate

integral sign ("S") tan^4 y sec^3 y dy

now the identity says if the power of tan is odd - which it isn't - or if the power of sec is even which it isn't so what do I do with this so I can use the identity. I thought about (tan^2 y)^2 sec^2 y sec y dy but I think I am just going to end up with leftovers I don't know what to do with

Direction is appreciated.

Thanks

Calculus Beginner