$\int\:x^3\:e^{4x}\:dx$
$\sqrt[3]{8a^4}+\frac{16}{4}a^3-2^3a^2$
$\left(a-x\right)\left(a+y\right)$
$\:-\:5x=\:-15$
$2\:\left(3x^2y^4-2x^3y^3+4x^4y^2\right)$
$\frac{x^5-3x^3+1}{x}$
$66\cdot63$
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