This document contains a series of mathematical equations with no context or explanation. The equations involve multiplication and addition of various numbers, with the goal of solving for the unknown variable in each case.

1. 45 x 35 =

2. 2 13 x 3 =

3. 4 x 13 =

4. 5 12 x 16 =

5. 13 x 7 =

6. 3 12 x 13 =

7. 12 x 78 =

8. 6 x 47 =

9. 4 13 x 113 =

10. 712 x 2 23 =