85. |3a-6| – |2a-1|, եթե a = -2
|-6-6| – |-4-1|
|-12| – |-5|
12-5 = 7
86. |2a-5| – |5a-3|, a = -6
|2 × (-6) – 5| – |5×(-6)-3|
|-17| – |-33|
17 – 33 = -16
90. |a-3| – |a-4|, a = 0
|0-3| – |0-4| = |-3| – |-4| = 3-4 = -1
105. 16² × 32³/2¹⁰ = 2¹⁵/2² = 2¹³
111. (√8-√5) (√8+√5)
(√8)² – (√5)²
8-5 = 3