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(2 3/11- 1 3/22) * ( 3 1/7 +5 1/2)=

(2³/¹¹ -1³/²²)•(3¹/7+5½)=
2³/¹¹ -1³/²²=1+³/¹¹-³/²²=1+³*² -³/²²=1+³/²²=1³/²²
3¹/7+5½=8+¹/7+½=8+¹*²+¹*7/¹⁴=8+9/14=8 9/14
1³/²²•8 9/¹⁴=275/28=9 ²³/²8;