$2xe^{x-y}+y'=0$
$6\left(m^2+3n\right)$
$\sin2x+\sin x+2cosx+1=0$
$2x+3y=5x-y$
$\:\frac{2}{\left(1+x^2\right)^2}$
$x-13=10$
$\left(7x-8y\right)^3$
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