$9\sin\left(a\right)-1=5\sin\left(a\right)-4$
$\frac{6y}{2y^2}$
$\frac{10a^7b^9}{15a^5b^9}$
$a3+125$
$\int2r^2\:e^x\:dx$
$\left(2x+40\right)\left(x+6\right)$
$\left(a^{x+1}+b^{x+2}\right)^2$
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