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Expression: 1 + 2*3 - 5
Result: 2
Expression: "Hello " + "World!"
Result: Hello World!
Expression: "1" + 2
Result: 12
Expression: {0.2, 1} - 10
Result: {0.2,-9}
Expression: {1/2, 5*5+1} + {1/3, -12} * 0.5 + 1
Result: {0.5,21}