−9(−3)-9\left(-3\right)−9(−3)
2cot(x)=−152\cot\left(x\right)=-\sqrt{15}2cot(x)=−15
2x3+x2−4x−32x^3+x^2-4x-32x3+x2−4x−3
x3+x2−1x2+x\frac{x^3+x^2-1}{x^2+x}x2+xx3+x2−1
6⋅0.86\cdot0.86⋅0.8
−564−90-564-90−564−90
35m5−49335m^5-49^335m5−493
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