$x-4<-1$
$12+-17+6+-13$
$\left(3x^2+8y^2\right)dx+\left(16xy+15y^2\right)dy=0$
$2+\cot\left(x\right)^2=\csc\left(x\right)^2$
$-\:6\left(5m+3\right)$
$\int\frac{x}{49+25x^4}dx$
$\left(5a^2-1\right)\left(5a^2+1\right)$
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