$-3\frac{d^2y}{dx^2}+6\frac{dy}{dx}-78y=0$
$\int x\left(x^2-5\right)^3dx$
$\left(4x^2-2y^2\right)^2$
$y^'+y=x$
$220+45-6+20$
$a5+67=b$
$7bc^2-11bc^2$
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