$1+2-3+4+5+6$
$\left(3xy\right)^3$
$\left(-3x+7\right)<2$
$\frac{dy}{dx}=\left(-2x+y\right)^2+7$
$\left(6y^3-8xy^2-6xy^2\right)-\left(xy^2-6y^3+4\right)$
$\sec\left(a\right)-\cos\left(a\right)=\tan\left(a\right)\cdot\sin\left(a\right)$
$sin\:4x=-\frac{2\sqrt{3}}{3}$
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