train/algebra/1054.json

{
    "problem": "The function $f(x)$ is defined by $f(x)=x^{2}-x$. What is the value of $f(4)$?",
    "level": "Level 1",
    "type": "Algebra",
    "solution": "$f(4)=4^2-4=16-4=\\boxed{12}$."
}