$\frac{\cos\:x}{tan\:x\:\left(-\:1\:sen\:x\right)}$
$y=\cos\left(x^{2}\right)\cdot\ln\left(x^{2}\right)$
$144x^2-120x+25=0$
$\log_{11}\left(x\right)=2$
$\frac{1-125a^6}{1-5a^2}$
$a^4-5a^2-5a$
$\left(p+5q\right)^3$
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