$4a\:-10$
$\int\frac{x^2}{\left(x^3+1\right)^3}dx$
$3x^{2}+5x-6+2x^{4}-2x^{3}+4x-2$
$0.36x^4-1.2x^2y+y^2$
$5x^2+60x+25=0$
$3x^2-18x+9^2$
$2x\:+\:x\:-\:4y$
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