$\int\frac{3x-2}{x^3+42x^3+4x}dx$
$a^4+4a^2-16$
$2a^2-3ab-4a+6b$
$\sqrt{-\left(x^2+x-1\right)}$
$-3x^2+2y^2-7+10x^2-12y^2+15$
$3\cdot\left(-12\right)\cdot0$
$\int_0^{\frac{\pi}{4}}\left(\tan^5\left(x\right)\sec^2\left(x\right)\right)dx$
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