['I really should have studied more for my math exam in college. I decided going out with friends would be more fun.']
Sometimes going out with friends can relax the mind, who knows you might ace the test .
I really needed to study for my college math exam but I decided it would be more fun to go out with my friends. I knew I wasn't very good at math and it takes a lot of effort for me. I ended up failing my exam. I felt really bad about myself.