$\sin4x-\sqrt{2}\sin2x=0$
$2\cos^2\left(x\right)-1\:=sen\left(x\right)$
$\frac{dy}{dx}+xy=1+e^{y-x+5}$
$9x^2+24^2-16$
$b^3^a$
$\int\left(x^2+2x\right)\left(x+2\right)^{-3}dx$
$-144-45-89$
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