#### Answer

$9$

#### Work Step by Step

Solve using PEMDAS (The priority list for solving expressions: Parentheses, exponents, [multiplication, division], [addition, subtraction]. For the operations in the brackets, solve from left to right)
$\dfrac{5^2-2^3+1^4}{10\div5\cdot 4\cdot 1\div4} = \dfrac{25-8+1}{10\div5\cdot 4\cdot 1\div4} = \dfrac{25-8+1}{2} = \dfrac{18}{2} = 9$