1 = 207+1

2 = 2+017

3 = 2+0*7+1

4 = (7+1+0)/2

5 = -2+0*1+7

6 = -2+0+1+7

7 = 201+7

8 = 2*0+1+7

9 = 2+0*1+7

10 = 2+0+1+7

11 = 12-7^0

12 = 12-7*0

$1 = 2*0*7+1$

$2 = 2+0*1*7$

$3 = 2+0*7+1$

$4 = (7+1+0)/2$

$5 = -2+0*1+7$

$6 = -2+0+1+7$

$7 = 2*0*1+7$

$8 = 2*0+1+7$

$9 = 2+0*1+7$

$10 = 2+0+1+7$

$11 = 12-7^0$

$12 = 12-7*0$