$-110-60-50+0$
$\int-\frac{3}{4}dx$
$\frac{1}{x^2}dx+\frac{1}{y^2}dy=0$
$\frac{25a^2y^2+ay-35}{5ay}$
$9m^2+36mn+36n^2$
$25y^2z^4-121$
$3n-1=-22$
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