$\lim_{x\to0}\left(\frac{2x+sinx}{x^2+x}\right)$
$\lim_{x\to0}\left(\frac{3x+tan\left(4x\right)}{5x-tan\left(4x\right)}\right)$
$\lim_{x\to0}\left(\frac{4}{x^3-2}\right)$
$-n\:+\:9n\:+\:3-8\:-\:8n$
$x p 1 + 2 ^ { x }$
$z^3+125$
$\frac{sec\left(x\right)+cot\left(x\right)\csc\left(x\right)}{\sec\left(x\right)\tan\left(x\right)+\csc\left(x\right)}$
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