**Please post your test problems this way:**

- Problem:(answer,level of difficulty(easy, medium, hard))
- Example 2x=6: (x=3,easy)
- Example 2x+x^2+x(=3x+x^2(form1 level))
- Example combine1:2,3:2(=6:4:2)(form2 level)

**Please post your test problems this way:**

- Problem:(answer,level of difficulty(easy, medium, hard))
- Example 2x=6: (x=3,easy)
- Example 2x+x^2+x(=3x+x^2(form1 level))
- Example combine1:2,3:2(=6:4:2)(form2 level)