$3p>-19$
$121-16z^4$
$\left(2x-8\right)+\left(5x+2\right)$
$\infty\left(x^2-\frac{4x}{3}+\frac{1}{3}\right)$
$2Sen^2\theta+Sen\theta-1=0$
$1+\frac{1}{sec^2x}=1$
$14\:-0.13$
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