$-7c+-8c+-2c$
$cos^2x=0,\:5$
$n^2-12n+144$
$\left|-7\right|-12$
$\left(5x^3-y^2\right)^3$
$\int\frac{1}{x\left(x^2+3\right)^2}dx$
$\int\left(x+2\right)\sqrt{x+1}dx$
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