$\frac{2}{x+2}+\frac{5}{x-2}=\frac{6}{x^2-4}$
$-4x^2-9x^3$
$7 x - 4 = 3 x + 8$
$100\cdot6$
$x+11^{2}$
$3y-8=13-4y$
$e^{2.99}$
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