$\int\frac{2x}{e^2}dx$
$\frac{63m^8}{7m^4}$
$x-4=4x+11$
$a^2+7a+12=0$
$3\left(\cos\left(3x\right)-\cos\left(x\right)\right)$
$\int\left(\frac{1}{x^2\sqrt{36x^2-49}}\right)dx$
$2x^2-5x=1$
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