Answer Posted / vivek

take a stack and push operators into stack such as (*,+,_,/,etc) and when 2 operands(let a & B) appears pop out 1 operator and perform the expression (a operator B) and push it in 2 a stack



eg: ++2 6+-13 2 4
+(2+6) +-13 2 4
+8+(13-2)4
+8+11 4
+8(11+4)
+8 15
8+15
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