❓😴❓
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#letter x
#letter z
#x z x
#pattern
#A-B-A
#variable x
#unknown
#sleepy
#question mark
#symmetry
∫🗳🗳️
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#integral
#differential
#variable x
#x dx integral
❓#️⃣
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#unknown number
#variable x
#variable n
#placeholder x
#placeholder number
#symbolic representation
✖️✖️✖️✖️
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#multiplication
#times
#cross symbol
#variable x
#four xs
#letter x #letter z #x z x #pattern #A-B-A #variable x #unknown #sleepy #question mark #symmetry