$\left(5x^2+x\right)\left(2x+3\right)$
$4ax-9b+3a-12bx$
$3x-4\sqrt{9x^2+0x-16}$
$3b+2c=-4$
$7a-7b+5a+2b$
$\lim_{x\to\infty}\left(\left(e^{-1.11x}\cdot\left(0.0078cos\left(6.165\right)x+sen\left(6.165\right)x\right)\right)-0.0078cos\left(2x\right)+0.062sen\left(2t\right)\right)$
$\left(2c^2-5r^3\right)^2$
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