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Mathematics
Problem
Sort the following expressions into the categories monomial, binomial and trinomial:
2
,
x
2
−
1
,
4
x
,
x
2
+
5
x
+
6
2,\;x^2-1,\;4x,\;x^2+5x+6
2
,
x
2
−
1
,
4
x
,
x
2
+
5
x
+
6
.
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