$x^2+7=42$
$\log_{49}\left(x\right)=\frac{1}{2}$
$\frac{x^2+4x+4}{2x-4}$
$\frac{2^n}{4^n}$
$2a^{-1}\cdot3a^2$
$\int\frac{3x^4-7}{x^2}dx$
$x^2-10x+90$
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