8 lines
145 B
Text
8 lines
145 B
Text
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vardef evalit(expr s, va, vb) =
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save x,a,b; x := va; a := scantokens s;
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x := vb; b := scantokens s; a-b
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enddef;
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show(evalit("2x+1", 5, 3));
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end
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