$xy+2y=4x^2$
$y^'=y^2-\frac{y}{x}-\frac{25}{x^2}$
$\int\left(-1sin^2xcosxln\left(sinx\right)\right)dx$
$\left(x^2+7x+5\right)+3x^2+21x+17$
$-3m\frac{1}{2}n$
$4x^4-4x$
$\left(-7a+4b\right)^2$
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