$\int\frac{e^x}{16+e^{2x}}dx$
$\int\sin\left(x\right)e^{-sx}dx$
$x^2-11x+39$
$-\:5\:\left[\:-\:3\:\left(\:2\:+\:3x\:\right)\:-\:6\:\left(\:1\:-\:2x\right)\:\right]\:\:>\:\:-\:3\:-\:2\:\left(\:x\:+\:6\:\right)\:+\:8\:\left(\:-\:3\:-\:4x\:\right)$
$x^2+75x+25$
$-0+2\cdot4$
$x^2-4x+1=\:0$
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