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+# Experimental!
+
+$ xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))
+Input ←
+
+Part₁ ← /+≡/×⋕↘0_1regex "mul\\((\\d+),(\\d+)\\)"
+
+DontDos  ← ∩(⊚⌕)"do()","don't()"
+Disabled ← ≡(⊂⤚(⊢▽>,)) ¤DontDos
+Part₂    ← Part₁ ▽¬/∨≡(≤⇡:°⊟) Disabled .
+
+⊂⊃Part₁Part₂ Input