$-3+5-7-3+7-5+1$
$\frac{\left(-1\right)^n\cdot625\left(x^{2n+2}\right)}{2n+1}$
$\int 5 ^ { 3 x } d x$
$81x^2-36x+1$
$\left(3m-8p^2+5m^2-3p\right)-\left(4p^2+7p-8m\right)$
$-24-230-45$
$\left(x-y+z\right)^2-\left(2x+3y-z\right)^2$
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