Oh shit

Proofs to be done:
#1 1.6 -3 done
#2 you prove page 17 3b DONE
#3 2.3 -3 done
#4 2.3 -10 DONE
#5 2.4 -2 DONE
#6 2.4 -3 DONE
#7 2.4 -17 DONE
#8 5.3 -3 done
#9 3.3 -12 done, or the formula he gave me doesn't work
#10 3.6 -7 DONE
#11 4.1 -21
#12 4.6 -11 done
#13 4.4 -2 done
#14 4.4 -4 done
#15 4.7 -13