$\lim_{x\to1}\left(\frac{1-\cos\left(x-1\right)}{\ln\left(x\right)}\right)$
$\sin\left(3x+\frac{\pi}{2}\right)$
$3x^3-2x^2-3x+2$
$\left(a^x+b^{y+1}\right)^2$
$-6r-3\left(-1-3r\right)$
$3ab^2+14ab-14a^2c-10ab+4a^2b+3a^2b$
$6x^2+5x-56$
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