study

I research the graph of fouth function

I read a history book.

I learning english 30 mintues.

I solve the second eqation.
second eqation have a factorization and quadratic formula

I research the graph of fourth function.

I read  history book.

I am learning English for 30 mintues.

I solve the second equation.

second eqation have a factorization and quadratic formula