(−30).(+0)\left(-30\right).\left(+0\right)(−30).(+0)
csc(x)cot(x)+3csc(x)=0csc\left(x\right)cot\left(x\right)+3csc\left(x\right)=0csc(x)cot(x)+3csc(x)=0
limx→−2(x3−5x2+1)\lim_{x\to-2}\left(x^3-5x^2+1\right)x→−2lim(x3−5x2+1)
2x2−7x−9=x2−4x−52x^2-7x-9=x^2-4x-52x2−7x−9=x2−4x−5
−2x2−2y−z-2x^2-2y-z−2x2−2y−z
2.sin(x)tan(2.x)+sin2(x)cos(x)=cos(x)\frac{2.\sin\left(x\right)}{\tan\left(2.x\right)}+\frac{\sin^2\left(x\right)}{\cos\left(x\right)}=\cos\left(x\right)tan(2.x)2.sin(x)+cos(x)sin2(x)=cos(x)
4−x>04-x>04−x>0
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