e, 
13−34−(−35)+164−29−136+115=13−34+35+164−29−136+115=(13+35+115)−(34+29+136)+164=(515+915+115)−(2736+836+136)+164=1515−3636+164=1−1+164=164

 f 

−1​−5−3​+9−1​+1311​−7−2​+354​−187​

=−12+35−19+1131+27+435−718=2−1​+53​−91​+1311​+72​+354​−187​

=110−1221179+25−718=101​−1179122​+52​−187​

=−4111790+190=−1179041​+901​

=1131=1311​

 g 

5 – 

= 5 – 

= 5 – 

= 5 –  

= 5 – 2

= 3

h,

−257​+25−18​+234​+75​+2319​   

=(−725−1825)+(423+1923)+57=(−257​−2518​)+(234​+2319​)+75​   

=−1+1+57=−1+1+75​   

=0+57=0+75​   

=57=75​

 i, 

A=7/19.8/11+7/19.3/11+12/19

A=7/19.(8/11+3/11)+12/19

A=7/19.1+12/19

A=7/19+12/19

A=1

k,

A = 2332​. 5665​. 910109​.14151514​... 209210210209​

  = 4664​. 10121210​.18202018​.28303028​... 418420420418​

  = 4.10.18.28...4186.12.20.30...4206.12.20.30...4204.10.18.28...418​

  =  1.4.2.5.3.6.4.7...19.222.3.3.4.4.5.5.6...20.212.3.3.4.4.5.5.6...20.211.4.2.5.3.6.4.7...19.22​

  = (1.2.3.4...19)(4.5.6.7...22)(2.3.4.5...20)(3.4.5.6...21)(2.3.4.5...20)(3.4.5.6...21)(1.2.3.4...19)(4.5.6.7...22)​

  =  1.2220.320.31.22​= 22606022​= 11303011​

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