8x−0.02x28x-0.02x^28x−0.02x2
limn→∞lnn2+72n\lim_{n\to\infty}\ln\frac{n^2+7}{2n}n→∞limln2nn2+7
−3x+4y−2z+2x2−x+y−z−x2-3x+4y-2z+2x^2-x+y-z-x^2−3x+4y−2z+2x2−x+y−z−x2
(8x4−2)(8x4+6)\left(8x^4-2\right)\left(8x^4+6\right)(8x4−2)(8x4+6)
sin(y)+tan(y)1+sec(y)=sin(y)\frac{sin\left(y\right)+tan\left(y\right)}{1+sec\left(y\right)}=sin\left(y\right)1+sec(y)sin(y)+tan(y)=sin(y)
10b−4b−b+2+610b-4b-b+2+610b−4b−b+2+6
−(2n−7)−3(5−2n)-\left(2n-7\right)-3\left(5-2n\right)−(2n−7)−3(5−2n)
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