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ctg(x)
tan(x)*ctg(x)
tan(x)
3*x-(2*y)-16;2*x+3*y-2
ln(4)*x
| 2(6y-3)=60 | | 9(p-6)=25(p-1) | | 4x^5-5x^4-19x^3-7x^2+3x=0 | | 200x-x^2=20x+5600 | | 0.15x+0.50-0.10x=0.7 | | 60-20h=140 | | 3(2a+2)=30 | | 1(p-4)=12(p-9) | | 2x^4-242x^2=0 | | 0.2(x-30)=2.4 | | 3x+4y=1782x+5y=178 | | 5x^3+12x^2+4x=0 | | -5r+5s+3t=-23 | | -4t+156=24 | | 10(x-9)=-14 | | 4x+0.8x=y | | -5-6(p+2.3)= | | 10(x+9)=-14 | | 4x+8.8x=y | | n+3.5=6.87 | | 6x+30=4x+36 | | 5x-3=6x-30 | | 210+.10x=X | | 3v-14=40 | | 10x=7x+43 | | 7x+18+9x+2=180 | | -6r+6t=-12 | | a*5+4=15 | | -10p-9=2p | | -5n+4-n+8=-3(2n-1)+8 | | Y=in(x-2) | | X^2-14X+49=2X^2-16X+25 |