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(321* 2 -115*4)+42 :v = 180 +2 * 4

Răspuns :

(642-460)+42:v=180+8
182+42:v=188
42:v=188-182
42:v=6
v=42:6
v=7
(642-460)+42:v=180+8
182+42:v=188
42:v=188-182
42:v=6
v=42:6
v=7