$4\cdot6-8\cdot2-3\cdot9$
$\left(5x\:+\:8k\:-\:9\right)-\:\left(4k\:+\:6\:\right)$
$225x^{10}+360x^5y^4+15x$
$\left(4a^2-a^2\right)+\left(2a+2\right)+\left(3\right)+\left(a\right)$
$6x^2+4x+3$
$6^4\left(-3\right)^4m^4$
$\left(2\:\sqrt{3}+3\:\sqrt{2}\right)^2+\left(2\:\sqrt{3}-3\:\sqrt{2}\right)^2$
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