The value of
x
3
−
397
x
+
55
\displaystyle {x}^{{3}}-{397}{x}+{55}
x
3
−
397
x
+
55
when
x
=
−
20
\displaystyle {x}=-{20}
x
=
−
20
is
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Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity