$-4y+18=5x+4y$
$\frac{1}{x}\ge2$
$\left(v-5\right)\left(v+6\right)$
$\int\frac{\left(sen\:z\right)}{cos^4z}dz$
$\left(-1+3i\right)^2$
$\frac{-12a^3b^4}{6a^3b^4}$
$4k^2+64k=-180$
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