Помогите 3,4,5,6 и #1052 , #1053 <20 БАЛЛОВ>

Question

Помогите 3,4,5,6 и #1052 , #1053
<20 БАЛЛОВ>

---

---

Answer 1

(4*3)/45 - 2/45 +(7*5/45=12/45 -2/45 +35/45=45/45=1
4) =(12-1+5)/14=16/15=1 (1/15)
4)  =12/14-1/14+5/14=)12-1+5)/14=16/14=8/7=1(1/7)
4)=(7*7+9*6-3*2) /70=(49+54-6)/70=57/70
5)=(49+35-6)/70=77/70=88/70=44/351(9/35(
6) =33/36-4/36+9/36=(33-4+9)/36=38/36=19/18=1(1/18)