Art Piece and Algebra Keys

Tifa belongs to the stunning, socialite and popular guys at Langnikel High. It was the dog days of summer, every student was very sluggish and teachers were all covered in stinkin sweat. Everybody in Algebra class endures listening to the the terror and most boring teacher of the year, Mrs. Dibs. Tifa was spotted sleeping on her armchair with hands covered in paint and made her answer a simple problem. Failed to answer, Tifa was annoyed and immediately wrote the problem on her chair without thinking. The next day, she was surprised to see something on her armchair.