a) \( -(+4)+(-2)+(-7-5)-(-1)-(-2-3)= \) b) \( -(+5)-(+10)+(-3)-(-4)+(+5)-(+2)= \) c) \( 5-[7-2-(1-9)-3+(4-7)-12]+4= \) d) \( 8-[6-(-3+7-1+4)-6]+4+5= \) e) \( 1+(-6+3+1)-[-2-(5-3+1)-2]= \) f) \( 7-\{4+2-20+[-5+3-(-15)+3]-1\}= \) g) \( \quad-2-3+1-[7+6+(4-5)-2]+1-3= \)
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To solve these mathematical expressions, let's break them down step-by-step! First, for \( -(+4)+(-2)+(-7-5)-(-1)-(-2-3) \): 1. Calculate \( -7 - 5 = -12 \). 2. Then, \( -(-1) = 1 \), \( -(-2 - 3) = 5 \). 3. Combine everything: \( -4 - 2 - 12 + 1 + 5 = -12 \). Now for \( -(+5)-(+10)+(-3)-(-4)+(+5)-(+2) \): 1. Note that \( -(-4) = 4 \). 2. So, the expression simplifies to \( -5 - 10 - 3 + 4 + 5 - 2 \). 3. Combine: \( -5 - 10 - 3 + 4 + 5 - 2 = -11 \). Next, consider \( 5-[7-2-(1-9)-3+(4-7)-12]+4 \): 1. Simplifying inside the brackets first gives \( 7 - 2 + 8 - 3 - 3 - 12 = -5 \). 2. The expression becomes \( 5 - (-5) + 4 = 5 + 5 + 4 = 14 \). Moving to \( 8-[6-(-3+7-1+4)-6]+4+5 \): 1. Calculate the inside: \( -3 + 7 - 1 + 4 = 7 \). 2. Then, \( 6 - 7 - 6 = -7 \). 3. Thus, \( 8 - (-7) + 4 + 5 = 8 + 7 + 4 + 5 = 24 \). Next, for \( 1+(-6+3+1)-[-2-(5-3+1)-2] \): 1. First, simplify the inner part: \( -6 + 3 + 1 = -2 \) and for the bracket \( -2 - (5 - 3 + 1) - 2 = -2 - 3 = -5 \). 2. Ultimately, \( 1 - (-2) + 5 = 1 + 2 + 5 = 8 \). Now for \( 7-\{4+2-20+[-5+3-(-15)+3]-1\} \): 1. Simplify the innermost expression first: \( -5 + 3 + 15 + 3 = 16 \). 2. Then the next layer: \( 4 + 2 - 20 + 16 - 1 = 1 \). 3. Finally, \( 7 - 1 = 6 \). Lastly, for \( -2-3+1-[7+6+(4-5)-2]+1-3 \): 1. Calculate inside the brackets: \( 7 + 6 - 1 - 2 = 10 \), leading to \( -2 - 3 + 1 - 10 + 1 - 3 = -16 \). So, the final answers are: a) -12 b) -11 c) 14 d) 24 e) 8 f) 6 g) -16