$\frac{-5+5cos^2\left(x\right)}{sin^2\left(x\right)}$
$x+3\sqrt{3x^3}+2x^2-x+2$
$\cos\left(\frac{\pi}{2}-x\right).\csc\left(x\right).\tan\left(x\right)$
$\frac{4}{3}n+2=18$
$x^2+y^3=\left(x+y\right)\left(x^2-xy+y^2\right)$
$40\cdot25.4$
$\left(3x-4\right)\left(3x-1\right)$
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