$\left(5a-60\right)^2$
$-x^2y+8x^2y$
$t^2y'+ty=-8$
$5^{x-2}=5^{7x-8}$
$x^2-10x>-9$
$\frac{1}{3}\cdot450$
$1000-b\:^3\:+\:10-b$
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