$\lim_{x\to\pi}\left(\frac{sen\:\left(54x\right)}{sen\left(18x\right)}\right)$
$\frac{\left(5^4\right)\:\left(5^2\right)}{\left(5^4\right)\left(5\right)}$
$\int\:\frac{1}{4}e^{-2x}dx$
$\sqrt{\left(5x^2-3x-10\right)^2+\left(-5x^2+8x-4\right)^2}$
$\left(2a^3-b\right)^3$
$x^2+14x+49=0$
$\sqrt{11}cos\left(x\right)-3=0$
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