$y+6=14$
$\frac{\cot\left(x\right)-\tan\left(x\right)}{\cos\left(x\right)+\sin\left(x\right)}$
$-6-6\cdot3$
$\lim_{x\to4}\left(\frac{sen\:7x}{x}\right)$
$\frac{8x^3y}{\left(4xy^2-x^3\right)^2}$
$\lim_{x\to\infty}\left(\frac{-x}{10e^{10x}}\right)$
$-10\:y\:+6$
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