$36x^4-48x^3+49x^2$

$-2\left(-1\right)^2-\left(-2\right)\left(-1\right)^3$

$\frac{20}{\left(1-5\right)}-6\cdot\left(1-3\right)$

$\frac{dy}{dx}=xy-2y-2$

$\left(\frac{7}{2}m^2+\frac{5}{9}n\right)^3$

$\int_{-1}^2w^2v^{4w}dw$

$\int_0^{\sqrt{x}}\left(x\sqrt{x+1}\right)dx$