$m\left(r+2\right)+4$
$64-125y^3$
$64m^{10}-36n^{18}$
$30x^2+x-1$
$2x+y;\:x=7;\:a$
$\left(4\right)^4\:-\:2\left(4\right)^3\:-\:2\left(4\right)^2\:-\:2-4\:-\:3\:\:$
$\int\frac{x}{\sqrt{x^4+25}}dx$
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