3 1 5 x 2 1 7

- 3 1 5 x 2 7 8
- 1 2 x 1 3 5 x 2 7 9
- 3 x 1 )- 2 3x 1 )= 5 x 2 )+ 7
- Multiply 1 2 x 1 3 5 x 2 7 9
- 2 x 1 )- 3 5 2x 1 )- 7x
- 2 4 5 3 1 2 x 2 7 1
- 3 7 2x )+( x 1 )- 5 2 x )= 2x 1
- 2 3 1 7 x 5 6 1 12
- 3 1 2 x )- 5 x 1 10 )=- 7 4
- 1 5 5x 7 =( 2 3 x 1
- 2 x 1 )/ 5 3 x 1 )/ 10 7x 1 10
- 1 3 5 x 2 1 7 as a fraction
- 3 5 x 1 )- 2 70
- 1 2 x 1 3 5 x 2 7 9 as a fraction