Answer
$170$
Work Step by Step
Substitute $10$ to $x$ to obtain:
$=8 + 2(10-7)^4$
Simplify within the parentheses to obtain:
$\\=8+2(3)^4$
Apply the exponent. An exponent of 4 means $3$ will be multiplied to itself four times:
$=8+2(3 \cdot 3 \cdot 3 \cdot 3)
\\=8+2(81)
\\=8+162
\\=170$
