$6xz-16y-24+4xy$
$9+9\cos\left(x\right)$
$\int\:\frac{tan\:x}{\sqrt{sec^4x-4}}dx$
$\lim_{x\to0}x^{sin\left(x\right)}$
$\left(6\right)+\left(-5\right)-\left(8\right)-\left(-9\right)-\left(6\right)+\left(-10\right)$
$-9x^3y^4z^2+45x^2y^2+25y^2z$
$a^2x^2-2axby+b^2y^2$
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