$-3=2\left(1+\frac{dx}{dy}\right)$
$x^2+12x+9$
$\frac{cos^2\left(\theta\:\right)}{csc^2\left(\theta\:\right)}$
$144x^4-y^6$
$\arccos\left(\sqrt{\frac{3}{2}}\right)$
$5a-b-4a+b$
$\left(z^2-5y\right)^4$
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