question: Tobias bought a big pizza with 60 pieces. He ate 2/5 of the pieces on the first day, 10 pieces on the second day, and 7/13 of the remaining pieces on the third day. How many pizza pieces has he eaten so far?
answer: On the first day, Tobias ate 2/5*60 = <<2/5*60=24>>24 pieces of the pizza.
  On the second day, Tobias ate 10 more pieces of the pizza, totaling 24+10 = <<24+10=34>>34 pieces
  The number of pieces of pizza remaining is 60-34 = <<60-34=26>>26
  On the third day, Tobias ate 7/13*26 = <<7/13*26=14>>14 pieces of pizza.
  So far, he has eaten 14+34 = <<14+34=48>>48 pieces of the pizza he bought.
  #### 48