$278-\left(31\cdot7\right)$
$x^5y^2+\sqrt{5xy^2}+\sqrt{3}$
$\int6xe^{x^2-1}dx$
$\int\frac{x^3e^{-2x^4}}{e^{-2x^4}+4}dx$
$x-2<10$
$\left(7ab^3+5x^4\right)^2$
$\int\frac{3z^2+12z-9}{z^4}dz$
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