Question 886297
-(-1)+(-52)-4-(-21) 


-(-1)+(-52)-4+21


+1+(-52)-4+21


1+(-52)-4+21


1-52-4+21


-51-4+21


-55+21


-34



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So, -(-1)+(-52)-4-(-21) = <font color="red">-34</font>