$25^x=125^y$
$\int\frac{5x-11}{2x^2-x-15}dx$
$-\:4\:-\:\left(\:-\:9\::\:\left(-3\right)\:+\:1\:\right)\:$
$-8-\left(-3+5-2+1\right)-4-\left(-3+2\right)$
$-9x^2+18x+36$
$\frac{x-1}{4x+4}-\frac{x+b}{8x-8}$
$72\cdot45$
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