$x^2y^'+2xy=x-1$
$\left(-7x^3y^2\right)^3$
$r\frac{dv}{dr}=v^2+1$
$\int\sin\left(2mx\right)dx$
$\left(a^2-2ab\right)^3$
$\lim_{x\to\:\pi}\left(\frac{sen2x}{senx}\right)$
$\frac{4^{x+3}}{2^{x-1}}=64$
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