The document contains 6 math equations involving grouping symbols, numbers, variables, and operations such as addition, subtraction, multiplication, and modulo. The equations get progressively more complex, starting with grouping and basic operations and building to multiple nested groups and a variety of operations across different terms.

1. 1. 2x {[3+2 (4-3)-2 (6-8)-5]}=
2. 3x{4(2-7)-11-2[3(-5-1)]}=
3. 4-2{3[5-2(5-6)-7]+10}+17 =
4. [(7-19)+(-4+2)]{3[5-2(5-3)-12]+10}+170=
5. { [3 + 2 - (9 - 7) + (3 + 4) ] } x5 =
6. 14 + { 5 - [ 4 + 3 + ( - 2 + 4 + 5 ) ] - 97 % 8 }=