$x^2-\frac{2}{5}x+\frac{4}{25}=-1+\frac{4}{25}$
$5v-3v^2+3v^2$
$\frac{24}{2x}$
$x\frac{dy}{dx}=4y$
$6x^2+31x+30=0$
$senx+cscx$
$2x\left(3xy+2x\right)$
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