$\lim_{x\to0}\left(\frac{sen\:7x}{x}\right)$
$3x-6>7$
$\int\left(7x+x^2\right)sin8xdx$
$x^3-x^2+0+2$
$9-9y^8$
$\left(6h+2k\right)\left(5h+4k\right)$
$0.456\cdot3$
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