Помогите пожалуйста. Найдите значения выражения.

1). (6 - (3ц. 5/12)*(4ц. 36/41) + (2ц. 7/12)*(7/31)):11/12 - 11/12 = ?
По действиям.
1). (3ц. 5/12)*(4ц. 36/41) =
(41/12)*(200/41) = 200/12 =
50/3 = 16ц. 2/3
2). (2ц. 7/12)*(7/31) =
(31/12)*(7/31) = 7/12
3). 6 - 16ц. 2/3 + 7/12 =
-10ц. 2/3 + 7/12 = -10ц. 1/12
4). (-10ц. 1/12) : 11/12 =
(-121/12)*12/11 = -11
5). -11 - 11/12 = -11ц. 11/12
2). (4/15)*(11ц. 4/9)*((8ц. 4/3)*(3/8) - (9ц. 3/8)) + (4ц. 4/7):(4/7) = ?
1). (8ц. 4/5)*(3/8) = (44/5)*(3/8) = 132/40 = 3ц. 12/40
2). 3ц. 12/40 - 9ц. 3/8 =
3ц. 12/40 - 9ц. 15/40 =
-243/40
3). (4/15)*(11ц. 4/9) = (4/15)*(103/9) = 415/135
4). (415/135)*(-243/40) =
-103*9/50 = -927/50 =
-18,54
5). (4ц. 4/7):(4/7) = (32/7)*(7/4) = 8
6). -18,54 + 8 = -10,54
3). ((9ц. 4/5):2,3 - 4ц. 6/23 + 6ц. 1/2) : ((-3ц. 3/5 - 7ц. 2/3) : (-1)) = ?
1). (9ц. 4/5) : 2,3 = (49/5) : (2ц. 3/10) = (49/5) : (23/10) = (49/5)*(10/23) = 98/23 = 4ц. 6/23
2). 4ц. 6/23 - 4ц. 6/23 + 6ц. 1/2 = 6ц. 1/2
3). (-3ц. 3/5 - 7ц. 2/3) : (-1) = 3ц. 3/5 + 7ц. 2/3 = 10 + 3/5 + 2/3 = 10 + 19/15 =
169/15
4). (6ц. 1/2) : (169/15) =
(13/2) * (15/169) = 15/26
4). (5ц. 2/9)*(34/47):(3ц. 2/5) + (-25ц. 1/2 + 25,5)*(3ц. 2/3) = ?
1). (5ц. 2/9)*(34/47) =
(47/9)*(34/47) = 34/9
2). (34/9) : (-3ц. 2/5) =
-(34/9) : (17/5) = -(34/9)*(5/17) = -10/9
3). -25ц. 1/2 + 25,5 = 0
4). 0*(3ц. 2/3) = 0
5). -10/9 + 0 = -10/9