$c+2=7$
$14-20+25-30-35$
$\:\frac{x^3}{2}+xy^2+x^2=c$
$\left(1-x\right)dy-y^2dx$
$d^2+2d^2-13d+10$
$\cos^2\left(a\right)=\sin\left(a\right)+1$
$x^2+10x+125$
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