(3)2−12\frac{\frac{\left(\sqrt{3}\right)}{2}}{-\frac{1}{2}}−212(3)
cos−x\cos-xcos−x
12m+20mx+40my12m+20mx+40my12m+20mx+40my
−83+495-83+495−83+495
15−6(2−4x)−5x−215-6\left(2-4x\right)-5x-215−6(2−4x)−5x−2
0.75 350.75\:\:\frac{3}{5}0.7553
(z10+6x9)(z10−6x9)\left(z^{10}+6x^9\right)\left(z^{10}-6x^9\right)(z10+6x9)(z10−6x9)
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