integral for ln() and lg()
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@ -252,6 +252,13 @@ public class CalculatorEngineTest {
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CalculatorEngine.instance.getVarsRegistry().add(new Var.Builder("t", "2"));
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Assert.assertEquals("2t", cm.evaluate(JsclOperation.simplify, "∂(t^2,t)").getResult());
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Assert.assertEquals("4", cm.evaluate(JsclOperation.numeric, "∂(t^2,t)").getResult());
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Assert.assertEquals("-x+x*ln(x)", cm.getEngine().simplify("∫(ln(x), x)"));
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Assert.assertEquals("-(x-x*ln(x))/(ln(2)+ln(5))", cm.getEngine().simplify("∫(log(10, x), x)"));
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Assert.assertEquals("∫((ln(2)+ln(5))/ln(x), x)", cm.getEngine().simplify("∫(ln(10)/ln(x), x)"));
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Assert.assertEquals("∫(ln(10)/ln(x), x)", Expression.valueOf("∫(log(x, 10), x)").expand().toString());
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Assert.assertEquals("∫((ln(2)+ln(5))/ln(x), x)", cm.getEngine().simplify("∫(log(x, 10), x)"));
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}
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@Test
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