$\lim_{x\to\infty\:}\left(7+\frac{1}{x}\right)$
$9y+\left(-8x\right)-4x+1-2y+5$
$\left(3^{2x}+3^{-2x}\right)^2$
$\int\left(1-x\right)e^{-.5x}dx$
$3\cdot\left(3x^3\right)^2\cdot1$
$541+68$
$-6x^2-4lx+2l^2$
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