main
Added HW_01
HW_2 with 2 hard
Seminar_3, HW_3 with part 2 hard end
HW_5
HW_5 with CALC for jpg
HW_7
HW_7 all
HW_8 limited
HW_2
Seminar_3, HW_3 with part hard
Seminar_4, HW_4 with part hard
HW_5 with CALC
HW_6 and Seminar_6