$2x+4-6x$
$ln\left(y\right)=-\frac{1}{x}-ln\left(x\right)+c$
$64\cdot64$
$\int\frac{1}{-\sec^2\left(x\right)}dx$
$\frac{4x^2-4x-24}{x^2-x-2}$
$x-23=-7$
$2x^2+28x-49$
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