A simple operation of 18 out of 17 times 4 out of 5 minus 4 out of 17 times 3 out of 5

A simple operation of 18 out of 17 times 4 out of 5 minus 4 out of 17 times 3 out of 5

18 out of 17 times 4 out of 5 minus 4 out of 17 times 3 out of 5
=4 out of 17 times 18 out of 5 minus 4 out of 17 times 3 out of 5
=4 out of 17 times (18 out of 5 minus 3 out of 5)
=4 out of 17 times 3
=12 out of 17

16 / 13 times (13 / 9 times 17-13 / 9) - (12-5 / 4-3 and 13 / 5-2 and 13 / 18)=

13 of 16 times (9 of 13 times 9 of 17-13) - (4-3 of 12-5 and 5-2 of 13 and 18 of 13)
=(13 / 16) × (9 / 13) × 16 - (4 / 12-5 and 23 / 13)
=9 - (4 / 6-5-10 / 13)
=3 + 52 out of 65 + 50 out of 65
=3 + 102 / 65
=4 and 37 / 65

19 * 19 / 20 + 19 / 20

(19 + 1) * 19 / 20 = 19

Simple mathematical calculation 1 / 29 ({1 / 19 [1 / 9 (X-2) + 17] + 28} = 1

1/29({1/19[1/9(X-2)+17]+28}=1
1/19[1/9(X-2)+17]+28=29
1/19[1/9(X-2)+17]=29-28
1/19[1/9(X-2)+17]=1
1/9(X-2)+17=19
1/9(X-2)=19-17
1/9(X-2)=2
X-2=18
X=20