63 - (-3) {-2 - 8-3} /3 {5+(-2) (-1)}

  63-(-3) {-2 -8-3} /3 {5+(-2) (-1)} 

 =  (63+3) {-13} / 3 {5+2}

 =  66 x -13 /3 x 7

 = -858 / 21

 = 286 / 7 

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