$4\left(10\right)+25$
$\lim_{x\to0}\left(\frac{2senx\cdot\left(senx+b\right)}{x}\right)$
$x^2\:+22+\:64\:\:$
$16x^2+64x+64$
$12 \cdot 3 + 18 : ( - 2 + 8 )$
$\left(z^2+8\right)\left(4-z^2\right)$
$x^2y-xy$
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