$2^2\:+3^3\:-5^2\:-1^5$
$7x^4y^3-28x^4y^2$
$40c^2m+30b^3-20bm$
$\left(x^{3+n}\right)\left(x^{3n-1}\right)$
$152+b+226+c$
$x3+2x^2$
$sec\left(45\right)+sen\left(45\right)$
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