$4x^4+16x^2+16$
$\lim_{x\to\infty}\left(\frac{x^m}{e^x}\right)$
$\frac{3x}{25}x\frac{25}{9x}$
$\frac{d^2}{dx^2}\left(log\left(1+4x\right)\right)$
$-15.\sin\left(x\right)+9=-2$
$\lim_{x\to+\infty}\left(\frac{5^x+2^x}{5^x+3^x}\right)$
$-120+82+4$
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