$1a+9a$
$-4\left(x\:+5\right)-5\:\left(x-1\right)$
$0=25x^2-15x$
$\log_x\left(\frac{1}{16}\right)=-2$
$-2^2+\left(-2\right)+1$
$\int-\frac{8\left(x\right)}{\sqrt{25-x^2}}dx$
$-x^2+43x=-34$
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