$\lim_{x\to1}\left(\frac{sen\left(1+y\right)}{\left(1+y\right)}\right)$
$-\frac{4}{5}x+8$
$4\cos\left(2\right)x-4\cos x+1=0$
$\int_2^2100dx$
$\frac{dx}{dt}+\frac{3x}{60-t}=2$
$3n^2-60n+300$
$3+8b+7-3b+9$
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