$\lim_{x\to1}\left(\frac{\ln\left(1+x\right)-senx}{xsenx}\right)$
$\left(x-3\right)\left(x+3\right)\left(x+2\right)\left(x-4\right)$
$4\:+\:4x\:+\:7x\:+\:4$
$\left(3x+y\right)\left(y+2\right)$
$30-2^2-1^3\cdot3$
$-6n+9$
$\left(\frac{1}{2x^2}+4\right)\left(x^3+2\right)$
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