$2x^2+2b+5=0$
$\int\frac{1}{x\left(4-x^2\right)}dx$
$\left(d+b\right)^4$
$3a^2+5^2$
$\int\frac{t^{2}}{\sqrt{4-t^{2}}}dt$
$2\left(a\:-\:5\right)\:=\:24$
$\frac{3x^3+3x^2+3x-1}{x+1}$
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