$\lim_{x\to\pi}\frac{\sin\left(4x\right)}{\sin\left(3x\right)}$
$11x^7+\:9x^5-3x^4+\:5x^2-13x+\:9\:para\:x=\:2$
$\frac{10^{-5}}{2^{-5}}$
$\sqrt{x-8}=2$
$5.2-0.23+1.3$
$-x+xa$
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