1.

7 upon 6 + (-3 upon 5 + 2 upon 7)

Answer»

7/6+(-3/5+2/7)
LCM of 5&7=35
7/6+(-21+10/35)
7/6+(-11/35)
+-=-
7/6-11/35
LCM of 6&35=210
245-66/35
179/35= ANSWER



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