| 12a^5/6a^4 | 2a |
| b^0*20 | 20 |
| x^2+x^3 | x^2+x^3 |
| xy^2*x^2 | x^3*y^2 |
| a^2*a^2 | a^4 |
| x^11/x^7 | x^4 |
| y^3+y^3+y^3 | 3*y^3 |
| z^3*(-z)^4 | z^7 |
| a^13+a^9*(a^2)^2 | 2*a^13 = 2a^13 |
| x^2*x^3 | x^5 |
| 125x^8/25x^6 | 5x^2 |
| (a^3*b)^2 | a^6*b^2 |
| -(a)^3*(-a)^4 | -a^7 |
| x^5+x^3 | x^5+x^3 |
| x^5*x^3 | x^8 |
| (3a^2)^4 | 81a^8 |
| (-7)^0*2x^3 | 2x^3 |
| 3^2*x^5 | 9x^5 |
| a^6+a^4*a*a | 2a^6 |
| x^13:x^12 | x |