$\frac{c}{3}+\frac{b}{5}-\frac{a}{2},\:a=2,\:b=5,\:c=3,\:d\:=-1,f=0$
$\left(3x+9\right)^2=7$
$-x^3+5x+7x^2+8x^3-\left(-x^3+x\right)$
$\left(-5\:x\:+\:3\right)\:\left(\:10\:x\:+\:4\right)$
$\sec\left(x\right)+3=1$
$cos\left(x\right)=\left(\frac{3}{5}\right)$
$20+90+nuvw$
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