$\int\ln\left(x^7\right)dx$
$x\left(x^2+x-1\right)-x^2$
$\frac{sinxcotx}{1+sinx}$
$2x+y;\:x=7;\:y=101$
$2\left(4+x\right)\ge11-5x$
$\frac{a-b}{c}-\frac{b}{a}$
$\left(2x+6y\right)^2\:=\:4x^2+24xy+36y^2$
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