$\left(x^2-2\right)\left(x^2-20\right)$
$\left(a+4b\right)\left(a+6b\right)$
$3m^2n-2mn^2+3;\:m=2;\:n=-2$
$\int\ln\left(2x^4\right)dx$
$2x+4x+\left(8x+3x-10-x\right)$
$9^0\:\cdot\:9^0\:$
$3x-8<19$
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