I'm so depressed.

Today my calc teacher said to me "Go home and do your homework, cause you obiviously haven't learn it" and it hurt my feelings cuz i studied for it. She put trick problems on the test. And i couldn't concentrate for the rest of the day. Here's a little taste of the test, and see if u agree with me.

Integral ( x sec (2x) tan (2x) dx )

Integral ( x ( ( X - 5 )^.5 ) dx )

Integral ( cot x dx)

if anyone care to enlighten me please do.