f(x) = (x^(2) - (2 * x)) / (1 + (cos(x))^(2))
g: y = 4
piirto1: PolyLine[(2.0669E0,7.0178E-1), (2.0404E0,9.2292E-1), (1.9610E0,1.0556E0), (1.8552E0,1.0556E0), (1.7228E0,9.8926E-1), (1.6434E0,6.7966E-1), (1.5905E0,3.9218E-1), (1.5729E0,1.2681E-1), (1.5729E0,-1.8279E-1), (1.5905E0,-3.5970E-1), (1.6434E0,-7.5776E-1), (1.6964E0,-9.7890E-1), (1.7493E0,-1.3106E0), (1.7846E0,-1.5096E0), (1.8640E0,-1.7529E0), (1.9610E0,-2.0183E0), (2.0316E0,-2.1731E0), (2.1021E0,-2.1731E0), (2.1992E0,-2.0625E0), (2.2962E0,-1.8635E0), (2.3491E0,-1.6202E0), (2.4021E0,-1.3327E0), (2.4550E0,-1.0674E0), (2.4638E0,-7.7987E-1), (2.4726E0,-4.0393E-1), (2.4638E0,-2.7991E-2), (2.4374E0,1.7104E-1), (2.3403E0,3.2584E-1), (2.2345E0,4.3641E-1), (2.1551E0,5.2486E-1), (2.1021E0,6.1332E-1), (NaN,NaN), true]
piirto2: PolyLine[(4.4662E0,6.3188E0), (4.4045E0,6.5178E0), (4.2986E0,6.6505E0), (4.2192E0,6.7611E0), (4.1487E0,6.8053E0), (4.0781E0,6.8495E0), (4.0075E0,6.8495E0), (3.9193E0,6.8053E0), (3.8223E0,6.7390E0), (3.7429E0,6.6284E0), (3.6900E0,6.4515E0), (3.6370E0,6.2746E0), (3.6194E0,6.0534E0), (3.6018E0,5.8765E0), (3.6018E0,5.5669E0), (3.6018E0,5.2573E0), (3.6547E0,5.0362E0), (3.7253E0,4.8150E0), (3.7958E0,4.7266E0), (3.8929E0,4.5718E0), (3.9899E0,4.5497E0), (4.0605E0,4.5497E0), (4.1928E0,4.6602E0), (4.3075E0,4.8150E0), (4.3780E0,4.9477E0), (4.4486E0,5.0804E0), (4.5192E0,5.3236E0), (4.5721E0,5.6332E0), (4.5897E0,5.9650E0), (4.5721E0,6.2967E0), (4.3604E0,6.5842E0), (4.2457E0,6.6947E0), (4.1487E0,6.7168E0), (NaN,NaN), true]
piirto3: PolyLine[(5.4366E0,1.4413E1), (5.4101E0,1.4634E1), (5.3043E0,1.4789E1), (5.2072E0,1.4899E1), (5.1102E0,1.4965E1), (4.8897E0,1.4988E1), (4.7485E0,1.4988E1), (4.5721E0,1.4766E1), (4.4486E0,1.4545E1), (4.3427E0,1.4280E1), (4.2722E0,1.4037E1), (4.2369E0,1.3838E1), (4.2016E0,1.3462E1), (4.1751E0,1.3152E1), (4.1663E0,1.2643E1), (4.1751E0,1.2179E1), (4.2016E0,1.1980E1), (4.3075E0,1.1715E1), (4.4133E0,1.1494E1), (4.5192E0,1.1405E1), (4.6250E0,1.1317E1), (4.6956E0,1.1317E1), (4.8014E0,1.1272E1), (5.0837E0,1.1272E1), (5.2954E0,1.1272E1), (5.4013E0,1.1361E1), (5.5071E0,1.1405E1), (5.6130E0,1.1405E1), (5.7277E0,1.1604E1), (5.7982E0,1.1869E1), (5.8423E0,1.2068E1), (5.8776E0,1.2290E1), (5.8953E0,1.2555E1), (5.9129E0,1.2865E1), (5.9129E0,1.3130E1), (5.9129E0,1.3528E1), (5.8423E0,1.3816E1), (5.8071E0,1.4015E1), (5.7188E0,1.4236E1), (5.6306E0,1.4501E1), (5.5336E0,1.4634E1), (5.4542E0,1.4766E1), (5.3572E0,1.4833E1), (5.1543E0,1.4855E1), (5.0308E0,1.4855E1), (NaN,NaN), (5.0308E0,1.3793E1), (4.9426E0,1.3793E1), (4.0957E0,1.3793E1), (3.2313E0,1.3793E1), (2.6843E0,1.3793E1), (2.4726E0,1.3793E1), (2.3844E0,1.3749E1), (2.2786E0,1.3705E1), (2.2080E0,1.3705E1), (1.4317E0,1.3705E1), (1.2377E0,1.3661E1), (3.7319E-1,1.3661E1), (2.0559E-1,1.3683E1), (9.0910E-2,1.3705E1), (3.7982E-2,1.3749E1), (NaN,NaN), true]