worksheet on algebra 2

1.     –a-[a+{a+b-2a-(a-2b)} – b] 
2.        2x-3y – [3x – 2y – {x – z – (x-2y)}] 
3.        5 + [x – {2y – (6x + y -4)+ 2x} – {x-(y-2)}]
4. x² – [ 3x + {2x – (x² -1)}+2]  
5.       20 – [5xy + 3{ x² – (xy-y) – (x-y)}] 
6.     85 – [12x -7(8x-3)-2 {10x – 5(2-4x)}] 
7.      xy[yz – zx – {yx – (3y – xz) – (xy – zy)}
8.        5 + [x – {2y – (6x +y -4) +2 x²} – (x²-2y)
9.         15x – [8x³ + 3 x² – {8 x² –(4 -2x – x³) – 5x³}-2x] 
10.   –m-[m+{m+n-2m-(m-2n)}-n]