Evaluate
10
x
4
−
2
y
2
\displaystyle {10}{x}^{{4}}-{2}{y}^{{2}}
10
x
4
−
2
y
2
when
x
=
2
\displaystyle {x}={2}
x
=
2
and
y
=
5
\displaystyle {y}={5}
y
=
5
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