$100x^2-81x^2y^4$
$x^6\cdot x^{-5}\cdot x^{-7}$
$4\sec\left(2x\right)-3=8$
$3x+1>10$
$y=\:\frac{\left(2x^2+2\right)^3}{\left(x+1\right)\left(3x+2\right)}$
$\sec\theta\cdot\:\cos^2\theta$
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