14°28'+42°42' =56°60'=57°
90°-30°15'20'' =89°59'60''-30°15'20'' =59°44'40''
55°28'+42°32'-13°27' =97°60'-13°27' =84°33'
15°51'×2=30°102'=31°42
14°28'+42°42' 90°-30°15'20'' 55°28'+42°32'-13°27' 15°51'×2
14°28'+42°42' 90°-30°15'20'' 55°28'+42°32'-13°27' 15°51'×2
数学人气：565 ℃时间：2020-01-27 08:56:20
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