$7\cdot3+6$
$-x^2-5x+4$
$\int_0^{\sqrt{2}}\left(\frac{1}{\sqrt{1-x^2}}\right)dx$
$-5\cdot210$
$6x^5y^2\:8xy^4$
$-12a^2+6ab-15a^2b^2$
$\left(-75\right)\left(-120\right)\left(-1\right)$
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