−7(1+2r)+7(6r+3)-7\left(1+2r\right)+7\left(6r+3\right)−7(1+2r)+7(6r+3)
limx→∞(ex54−x6)\lim_{x\to\infty}\left(\frac{e^{x^5}}{4-x^6}\right)x→∞lim(4−x6ex5)
(7a2b2c)(−4a−8b)\left(7a^2b^2c\right)\left(-4a-8b\right)(7a2b2c)(−4a−8b)
y′ =y(y−2)x(x−1)y^{'\:}=\frac{y\left(y-2\right)}{x\left(x-1\right)}y′=x(x−1)y(y−2)
limx→0(e−tt10)\lim_{x\to0}\left(e^{-t}t^{10}\right)x→0lim(e−tt10)
lny=−2x2+clny=-2x^2+clny=−2x2+c
x2 + x − 20a+1\frac{x^2\:+\:x\:-\:20}{a+1}a+1x2+x−20
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