6z6+5z4−7z2−2+2(x2−z2+6z)6z^6+5z^4-7z^2-2+2\left(x^2-z^2+6z\right)6z6+5z4−7z2−2+2(x2−z2+6z)
ab−3bc−2a+bcab-3bc-2a+bcab−3bc−2a+bc
2r+2+5r−2+r2r+2+5r-2+r2r+2+5r−2+r
1+1211+\sqrt{121}1+121
(a+b+c)2=1\left(a+b+c\right)^2=1(a+b+c)2=1
limx→∞(5x+1−5x)\lim_{x\to\infty}\left(5^{x+1}-5^x\right)x→∞lim(5x+1−5x)
∫0x2yex2dy\int_0^{\sqrt{x}}2ye^{x^2}dy∫0x2yex2dy
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