public static double conversion(String expression) {
		return (new Calculator()).calculate(expression);
	}
@Test
	public void conversationTest7() {
		//https://gitee.com/dromara/hutool/issues/I4KONB
		final double conversion = Calculator.conversion("((-2395+0) * 0.3+140.24+35+90)/30");
		assertEquals(-15.11, conversion, 0.01);
	}