$15m^5n^2+35m^3n^3+45m^2n^5$
$\int\frac{x^2+x+1}{x^4-x^3}dx$
$e=x^{3}+\frac{1}{x^{3}}\quad\text{si}\quad\frac{1}{x}+x=4$
$\frac{dy}{dx}-y=5$
$\left(-\frac{x}{3}+1\right)\left(-\frac{x}{3}+1\right)$
$\cos^3x=-\cos x$
$3y^4-2x^3y+4x^3-5y^4x+3;\:x=1;x=-1$
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