$-92-12$
$f^2+9f+1$
$\int\left(\frac{4x}{x-1}\right)dx$
$\frac{\sqrt{2}}{\frac{1}{x}}$
$\lim_{x\to5}\left(\frac{1}{5-x}\right)$
$x^2dy+\left(xy+x^2\right)dx=0$
$3w^2-5w+3=2$
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