| 1) | 8x -4y -3 x + 6y | 2) | 9x -10y -6 x + 3y |
| 3) | 6x -9y + 6 x + 2y | 4) | 6x -4y + x + 7y |
| 5) | 10x -5y + 10 x + 5y | 6) | 8x -4y -2 x + 5y |
| 7) | 2x -10y - x + 5y | 8) | 12x -10y + 2 x + 6y |
| 9) | 6x -5y + 5 x + 7y | 10) | 4x -6y + 9 x + 9y |
| 11) | 5x -9y -3 x + 6y | 12) | 9x -6y + 9 x + 6y |
| 13) | 2x -5y + x + 8y | 14) | 5x -9y -2 x + 6y |
| 15) | 7x -4y -2 x + 9y | 16) | 5x -10y -3 x + 7y |
| 17) | 10x -5y -3 x + 3y | 18) | 3x -8y + 6 x + 8y |
| 19) | 4x -7y + 6 x + 6y | 20) | 3x -6y + 8 x + 2y |
| 21) | 8x -5y + 3 x + 6y | 22) | 2x -5y -2 x + 3y |
| 23) | 12x -5y + 3 x + 6y | 24) | 3x -8y -3 x + 8y |
| 25) | 5x -6y -5 x + 4y | 26) | 6x -4y + 7 x + 7y |
| 27) | 8x -10y -2 x + 7y | 28) | 3x -7y + 11 x + 5y |
| 29) | 11x -7y + 4 x + 9y | 30) | 11x -9y + 11 x + 3y |
| 31) | 4x -8y + 10 x + 2y | 32) | 6x -7y + 12 x + 6y |
| 33) | 5x -7y + 11 x + 7y | 34) | 6x -5y + 7 x + 3y |
| 35) | 8x -8y + 6 x + 7y | 36) | 11x -5y + 5 x + 5y |
| 37) | 3x -4y -2 x + 8y | 38) | 8x -6y + 2 x + 8y |
| 39) | 2x -7y + 4 x + 3y | 40) | 2x -7y + 10 x + 9y |
Joke:
If your father was a mathematician, he would warn you in the form of 'I told you n times; and I told you n+1 times' and so on!