$\frac{x^3-3x^2+4x-4}{x^4-2x^3+2x^2}$
$\left(csc\left(x\right)\right)^2=\frac{1}{4}$
$\log\left(x^4\right)$
$\sec\left(x+30\right)=2.5$
$3x^2-18x-15=0$
$16x^2-32x+16$
$-3x^2+2x+7=0$
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