-4 2/3 *а*(-3/7)*в,при а*в=-3,5

1⃣630140:70•70+60•754-11223:87=675251
1)630140:70=9002
2)9002•70=630140
3)60•754=45240
4)11223:87=129
5)630140+45240=675380
6)675380-129=675251
2⃣98754-3268•(6075+9980-15996):38=93680
1)6075+9980=16055
2)16055-15996=59
3)3268•59=192812
4)192812:38=5074
5)98754-5074=93680
3⃣(20000-5163):37-16006:(4558:86)=99
1)20000-5163=14837
2)4558:86=53
3)14837:37=401
4)16006:53=302
5)401-302=99
4⃣(18305:7-2880:18)•74-157930=23740
1)18305:7=2615
2)2880:18=160
3)2615-160=2455
4)2455•74=181670
5)181670-157930=23740
5⃣328•406-(594264-9004•66)•8591=133168
1)9004•66=594264
2)594264-594264=0
3)328•406=133168
4)0•8591=0
5)133168-0=133168

630140 / 70 * 70 + 60 * 754 - 11223 / 87 = 675251
1) 630140 / 70 = 9002
2) 9002 * 70 = 630140
3) 60 * 754 = 45240
4) 11223 / 87 = 129
5) 630140 + 45240 = 65380
6) 675380 - 129 = 675251

98754 - 3268 * ( 6075 + 9980 - 15996 ) / 38 = 93680 
1) 6075 + 9980 = 16055
2) 16055 - 15996 = 59
3) 3268 * 56 = 192812
4) 192812 / 38 = 5074
5) 98754 - 5074 = 93680

( 20000 - 5163 ) / 37 - 16006 / ( 4558 / 86 ) = 99
1) 20000 - 5163 = 14837
2) 4558 / 89 = 53
3) 14837 / 37 = 401
4) 16006 / 53 = 302
5) 401 - 302 = 99

( 18305 / 7 - 2880 / 18 ) * 74 - 157930 = 23740
1) 18305 / 7 = 2615
2) 2880 / 18 = 160
3) 2615 - 160 = 2455
4) 2455 * 74 = 181670
5) 181670 - 157930 = 23740