v13.2 Speed-Ups

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expression factor   +/  ×/  ⌈/  ⌊/ 6 +⌿  ×⌿  ⌈⌿  ⌊⌿ 2 n|x when (0=⍴⍴n)∧n=2*k   19-34 2⊥x 17-21 ⌽b  ⊖b 2-93 ⌽x 4-230 (n⍴2)⊤x 19-21 x[b;...;] 2-17 ⍳n when ⎕io←0 1-2 ?x⍴2 when ⎕io←0 2-30 b/⍳⍴b  b/⍳n 3.5 ≤\b  >\b  ≥\b  ⍱\b  ⍲\b     ∞ -\x  ÷\x ∞ x∧.=⍉y   x∨.≠⍉y 2