$5a^2+15a+12=a^2-a-4$
$y^2-y-42$
$\int\left(ny\sqrt{m+ny}\right)dy$
$99\cdot80$
$m+1^4$
$5\sqrt{7}^2\cdot7$
$\frac{9.7^7}{9.7^3}$
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