−6 x −6 x −6 x −6-6\:x\:-6\:x\:-6\:x\:-6−6x−6x−6x−6
3ab(a+b)+3(a+b)2c+3(a+b)c23ab\left(a+b\right)+3\left(a+b\right)^2c+3\left(a+b\right)c^23ab(a+b)+3(a+b)2c+3(a+b)c2
limx→−∞(x(x+3)(x−3)(x+3)(x−3))\lim_{x\to-\infty}\left(\frac{x\sqrt{\left(x+3\right)\left(x-3\right)}}{\left(x+3\right)\left(x-3\right)}\right)x→−∞lim((x+3)(x−3)x(x+3)(x−3))
(a+b)2−(b−a)2+(a−2b)2−a−4b2\left(a+b\right)^2-\left(b-a\right)^2+\left(a-2b\right)^2-a-4b^2(a+b)2−(b−a)2+(a−2b)2−a−4b2
(19x−3y4)(17x3y−5)\left(\frac{1}{9}x^{-3}y^4\right)\left(\frac{1}{7}x^3y^{-5}\right)(91x−3y4)(71x3y−5)
3secx−2=43secx-2=43secx−2=4
8tana−54=08\tan a-\sqrt{54}=08tana−54=0
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