$420\cdot2$
$\int_1^{\sqrt{8}}\left(\frac{9}{1+x^2}\right)dx$
$-10-24+3-8+3-3+24-10$
$7\left(2m^2n-m\right)$
$-16-\left(-4\right)$
$\sin^2x\sec x-\sec x=-\cos x$
$\int-3^{3x^2}xdx$
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