$\left(-x-.5\right)^2$
$\frac{\left(\sin^2\left(x\right)cot\left(x\right)\right)}{x}$
$\frac{2x^4-2x^3+4x^2-5}{+2}$
$\frac{dy}{dx}-2ln\left(x^2+1\right)=0$
$\frac{t^2}{t-8}$
$\left(3\cdot5+3\right)-\left(2\cdot7+1\right)$
$\frac{2x^2-1}{x+1}$
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