1) −5/12−7/30-5/12 - 7/30−5/12−7/30 ÷ 13/1513/1513/15 = −25/60−14/60-25/60 - 14/60−25/60−14/60 ÷ 13/1513/1513/15 = −39/60-39/60−39/60 ÷ 13/1513/1513/15 = −39/60-39/60−39/60 * 15/1315/1315/13 = -585/780= -65/78
2) 1/4−5/181/4 - 5/181/4−5/18 36= 9/36−10/369/36 - 10/369/36−10/36 36= −1/36-1/36−1/36 * 36= -1
1) −5/12−7/30-5/12 - 7/30−5/12−7/30 ÷ 13/1513/1513/15 = −25/60−14/60-25/60 - 14/60−25/60−14/60 ÷ 13/1513/1513/15 = −39/60-39/60−39/60 ÷ 13/1513/1513/15 = −39/60-39/60−39/60 * 15/1315/1315/13 = -585/780
= -65/78
2) 1/4−5/181/4 - 5/181/4−5/18 36
= 9/36−10/369/36 - 10/369/36−10/36 36
= −1/36-1/36−1/36 * 36
= -1