$54-\left|21-38+\left(7-2\right)\cdot4\right|+5\left|27-4\cdot\left(15-4\cdot3\right)\right|\cdot4$

$72-\left(-9\right)$

$\left(1+x^2\right)\frac{dy}{dx}=2xy$

$9a^2-6ab+4b^2-7ab+a^2+4a-6b^2$

$\int\frac{-2x-4}{x^3+x^2-x}dx$

$5\int\frac{\sin\left(x\right)}{x}dx$

$\left(2x+12\right)$