$\left(3x^2+\frac{7}{2}x+5\right)+\left(-5x^2+\frac{3}{2}x-4x^3-\frac{1}{2}\right)$
$tan\left(2\theta\:\right)=\frac{2}{\left(cot\left(\theta\:\right)-tan\left(\theta\:\right)\right)}$
$15x\:\:\:\:=-30$
$\int\frac{2x^{3}-4x-8}{\left(x^{2}-x\right)\left(x^{2}+4\right)}dx$
$\frac{dy}{dx}=ax$
$3+cos\left(x\right)=1-7cos\left(x\right)$
$3\left(x-2\right)+x=2x-6$
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