$2\times4+9$
$\frac{-\sin\left(x\right)^2+\sin\left(x\right)+1}{\cos\left(x\right)}$
$x\:+1\le3$
$4\:sin^2x+8cos\:x-7=0$
$\int\frac{x^4}{x^3-3x^2+3x-1}dx$
$9y^2\:45yx$
$121x^4-144x^8$
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