Assignment:
Q1. Find an equivalent expression without parentheses:
-(8x + 4)
-(-2a + 9b - 5c)
Q2. Remove parentheses and simplify:
4y - (y + 5)
3a - 9b - 1/4a - 8b)
Q3. Simplify:
[9(x + 5) - 7] + [4(x - 12) + 9]
[6(x + 4) - 12] - [5(x - 8) + 14]
Q4. Simplify:
4 to the 3rd power + 10 x 20 + 8 to the second power - 23
4 x (6 + 8)/(4 + 3)
8[(6 - 13) - 11]
20(8 - 3) - 4(10 - 3)
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10(2 - 6) - 2(5 + 2)
Provide complete and step by step solution for the question and show calculations and use formulas.