cot(x−π2)=1cot\left(x-\frac{\pi}{2}\right)=1cot(x−2π)=1
a2−20a+28a^2-20a+28a2−20a+28
1−15−201-15-201−15−20
−9m − 6(m + 6)-9m\:-\:6\left(m\:+\:6\right)−9m−6(m+6)
(x−1)(x+1)(x2+1)(x4+1)\left(x-1\right)\left(x+1\right)\left(x^2+1\right)\left(x^4+1\right)(x−1)(x+1)(x2+1)(x4+1)
(x2y3+4)3\left(x^2y^3+4\right)^3(x2y3+4)3
n2+22n+121n^2+22n+121n2+22n+121
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