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ctg(x)/(e^x)
6*x^3+15*x^2+12*x+3 = 0;x
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5*x^2-(28*x)+0*x^3-12 = 0;x
x
1*x^3-(3*x^2)+0*x+4 = 0;x
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sin(x)*cos(x)
| r-14=-32 | | h(t)=-5t^2+10t+20 | | Q=1000-10p | | x-(x*.13)-17.44=225 | | -6x+2(6x-14)=38 | | C/5=12 | | 6x-10=x+6 | | Sin(4x)=cos(x) | | 180=4x+70+(5x-7) | | 7x+(-9x)=4 | | 2k+3=6k-5 | | Sin(3x+10)=cos(2x+30) | | 7x+(-9)=4 | | 4m-12=8+5m | | x+(2x-49)=35 | | C=15/13 | | 3xy/2xy | | 6x+(13-4x)=21 | | -107-x=10x+146 | | 7-3(9x+4)=-13 | | 10z+5=6 | | -27+10x=21+7x | | Y=9-3-1 | | 1/3*0.3 | | -4x-189=63+10x | | 6x+31=31x-53 | | -72-2x=-10+32 | | 180(7-2)/(7-2) | | 2(x-7)+3=-5 | | 4I(7x+9y)=14+7I | | Tan(x)=(2/3) | | 6x-20=28+3x |