$\frac{3-\left|3-x\right|}{\left|x^2-x\right|-2}\sec\left(0\right)$
$\tan\left(\tan+\cot\right)=\sec^2$
$\cos\left(57.36\right)$
$2a^{2}+4ab,sia=1=b=2$
$-2x=-2x^2+4$
$91+91$
$\left(3x^4y-2z^2w\right)^2$
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