13: \(386-\left(287+386\right)-\left(13+0\right)\)
\(=386-287-386-13\)
=-287-13
=-300
14: \(\left(-77+23\right)-\left(523-177\right)-21\)
\(=-77+23-523+177-21\)
\(=\left(177-77\right)+\left(-523+23\right)-21\)
=100-500-21
=-421
15: \(\left(435-167\right)-89-\left(435-89\right)\)
\(=435-167-89-435+89\)
\(=\left(435-435\right)+\left(89-89\right)+\left(-167\right)\)
=0+0-167
=-167
16: \(-329+\left(15-101\right)-\left(25-440\right)\)
\(=-329+15-101-25+440\)
\(=\left(-329-101\right)+\left(-25+15\right)+440\)
\(=-430-10+440\)
=0
17: \(4524-\left(864-999\right)-\left(36+999\right)\)
\(=4524-864+999-36-999\)
\(=4524-\left(864+36\right)\)
=4524-900
=3624
18: \(-35+\left(57+2021\right)-\left(2021-43\right)\)
\(=-35+57+2021-2021+43\)
\(=57+43-35\)
=100-35
=65
19: \(232-\left(581+132-331\right)\)
\(=232-\left(132+250\right)\)
\(=232-132-250\)
=-100-250
=-350
20: \(\left(35-17\right)-\left(25-7+22\right)\)
\(=35-17-25+7-22\)
\(=\left(35-25\right)-\left(17-7\right)-22\)
=0-0-22
=-22
21: \(332-\left(681+232-431\right)\)
\(=332-681-232+431\)
\(=\left(332-232\right)-\left(681-431\right)\)
\(=100-250=-150\)
22: \(\left(27+86\right)-\left(29-5+84\right)\)
\(=27+86-29+5-84\)
\(=\left(27-29\right)+\left(86+5-84\right)\)
\(=\left(-2\right)+\left(2+5\right)=-2+2+5=5\)
23: \(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=-452+452+67-75\)
=0-8
=-8
24: \(\left(16+23\right)+\left(153-16-23\right)\)
\(=16+23+153-16-23\)
\(=153+\left(16-16\right)+\left(23-23\right)\)
=153+0+0
=153
25: \(\left(27+65\right)+\left(346-27-65\right)\)
\(=27+65+346-27-65\)
\(=346+\left(27-27\right)+\left(65-65\right)\)
=346+0+0
=346
26: \(\left(134-167+45\right)-\left(134+45\right)\)
\(=134-167+45-134-45\)
\(=\left(134-134\right)+\left(45-45\right)-167\)
=0+0-167
=-167
