$\ln\left(x^8y^9z\right)$
$\frac{2x+6}{5}<0$
$\frac{\sin\left(x\right)}{\sec\left(x\right)\csc\left(x\right)}$
$x^3\:+\:x^2-x\:-1$
$\cos^2x-4\cos x+3=0$
$\left(x-1\right)\left(x+7\right)$
$\int-3dx$
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