$\int\left(x^2-5\right)^9\cdot x^2$
$-6x+2\ge8$
$tan^2\left(\frac{1}{2}\right)=\frac{tan-sin}{tan+sin}$
$\left(3a-3b\right)$
$\frac{dy}{dx}=y^2cot\left(2x\right)$
$\left(a\:+\:1\:\right)\left(a\:-\:1\:\right)\:-\:2\:\left(\:a\:-\:1\:\right)$
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