Evaluate the following

3x; x = 7

2. 12x + 3y – 1; x = 4 and y = 1

3. 5y – 1; y = 8

4. 7x – 11y; x = 5 and y = 2

5. x(6xy); x = -1 and y = 1

6. x − y4; x = 9 and y = -4

7. 1/2 ab + 4; a = - 3 and b = 4

8. 2 (x + y + z); x = 6, y = - 3 and z = 0

9. 5 (y- 3); y = 1

10. 5m6 - 6m5 + 5m4 - 4m3 + 3m2 - 3; m = -1

pls help…