$10\:.\:20a^2+a-1$
$\int x^2sec^2x^3dx$
$41-89-73$
$\int_2^{\infty}\left(\frac{0}{\left(1-3x\right)^4}\right)dx$
$1+2-3x^2-3x^2^2+3x^2^2+3-4$
$\left(4y\right)\frac{dy}{dx}-9x=0$
$-36x\:+\:21$
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