The average score of Li Ao's three subjects of Chinese, mathematics and English last semester was 90 points, 85 points for known Chinese, 92 points for foreign languages, how many points did he get for mathematics.
李敖上学期语文、数学、英语三门功课的平均分是90分，已知语文得了85分，外语得了92分，数学得了多少分．
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 - 85 - 92</gadget>
<output>93</output>

<result>93</result>