$-7+5-8-9+8-11-15+13-16$
$n\cdot2m^2n^4\cdot3nm^3$
$121-198a^6+81a^{12}$
$6sin^2w+sinw-1=0$
$-7\cdot32$
$y\left(1-x\right)dx+x^2\left(1+y\right)dy=0$
$\left(3g^2y^4x^8\right)^3$
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