$\left(-12+26\right)-\left(-4+-9\right)$
$( 2 x ^ { 3 } + 5 y ) ^ { 2 }$
$\int\frac{x+6}{x^2+2x}dx$
$4,\:9x^2-10x+0,\:4$
$6x^2+5y^2=36$
$4\sec\left(4x\right)^2\:$
$x^2-60+160$
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