Problem banyak banyak !

I have a problem here !!! Should I go for the class of 2 hours replacement or the concert !!! I want to go both also .. HELP ME !! but I only can choose one !!!! Damn frustrated!!! Why I always have this kind of problem !! Its the hardest ever to solve if its in the maths questions! Its harder that calculus, equation and others !! Barhhhh... hate it hate it ! HOW ......!!!! >,<