$\left(4n^5+9n-5n^2\right)+\left(-8n^2+7n^5+2n\right)$
$\frac{dy}{dx}=\frac{x^9}{9y^2}$
$\left(5+4i\right)+\left(6+2i\right)$
$3x^2+4x+1$
$\sqrt{5^2}\cdot3^3$
$\int\frac{2x+1}{\left(x^2+1\right)\left(x+1\right)^2}dx$
$- 2 x ^ { 3 } \psi ^ { 3 } + x \varphi$
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