$216\:-\:5$
$2y'+2y=0$
$\left(4a-3y\right)^2$
$\frac{x^{12}-y^{12}}{x^4-y^4}$
$9x^8+18x^5$
$2\cos^2\left(x\right)-1\:=sen\left(x\right)$
$\left(y^3-1\right)\left(y^3+1\right)$
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