$\frac{cos\left(x\right)}{cos\left(x\right)}=1$
$3x-11yx$
$\int a^{3x}dx$
$\left(5m-2n\right)^5$
$\sin u+2\sin^2=0$
$53.45+3.36+2.15$
$\left(2x-1\right)\left(x+2.5\right)=0$
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