$\int e^{-2\theta\:}\cdot\cos\left(\theta\:\right)d\theta\:$
$\frac{x^4}{4}-\frac{1}{4x^4}+\frac{1}{2}$
$\frac{\left(3x^2-5x-2\right)}{x^2-4}$
$\frac{\sin^2\left(x\right)+\cos^2\left(x\right)}{\sec^2\left(x\right)}=\cos^2\left(x\right)$
$3^{2x-7}=27$
$\left(2a^3b^2\right)\left(3ab^4\right)^3$
$y^4+13y^2+36y=0$
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